Finding the Fourth Proportional to 10,931,467.98, 16,384,156.20 and 5,087,790.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931,467.98 : 16,384,156.20 = 5,087,790.21 : x
2. Step 2: Convert to fraction form
   10,931,467.98/16,384,156.20 = 5,087,790.21/x
3. Step 3: Cross multiply
   10,931,467.98x = 16,384,156.20 × 5,087,790.21
4. Step 4: Simplify right side
   10,931,467.98x = 83,359,149,513,470.80
5. Step 5: Solve for x
   x = 83,359,149,513,470.80/10,931,467.98
6. Step 6: Final answer
   x = 7,625,613.47