Finding the Fourth Proportional to 2,585,386,513.86, 3,878,624,498.28 and 838,453,034.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,585,386,513.86 : 3,878,624,498.28 = 838,453,034.67 : x
2. Step 2: Convert to fraction form
   2,585,386,513.86/3,878,624,498.28 = 838,453,034.67/x
3. Step 3: Cross multiply
   2,585,386,513.86x = 3,878,624,498.28 × 838,453,034.67
4. Step 4: Simplify right side
   2,585,386,513.86x = 3,252,044,480,928,272,384
5. Step 5: Solve for x
   x = 3,252,044,480,928,272,384/2,585,386,513.86
6. Step 6: Final answer
   x = 1,257,856,209.70