Finding the Fourth Proportional to 1,238,074.47, 1,856,875.59 and 385,156.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238,074.47 : 1,856,875.59 = 385,156.71 : x
2. Step 2: Convert to fraction form
   1,238,074.47/1,856,875.59 = 385,156.71/x
3. Step 3: Cross multiply
   1,238,074.47x = 1,856,875.59 × 385,156.71
4. Step 4: Simplify right side
   1,238,074.47x = 715,188,093,123.71
5. Step 5: Solve for x
   x = 715,188,093,123.71/1,238,074.47
6. Step 6: Final answer
   x = 577,661.61