Finding the Fourth Proportional to 20,910,553.32, 31,353,651.12 and 8,116,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,910,553.32 : 31,353,651.12 = 8,116,111.25 : x
2. Step 2: Convert to fraction form
   20,910,553.32/31,353,651.12 = 8,116,111.25/x
3. Step 3: Cross multiply
   20,910,553.32x = 31,353,651.12 × 8,116,111.25
4. Step 4: Simplify right side
   20,910,553.32x = 254,469,720,486,668.31
5. Step 5: Solve for x
   x = 254,469,720,486,668.31/20,910,553.32
6. Step 6: Final answer
   x = 12,169,439.83