Finding the Fourth Proportional to 143,400.72, 215,096.22 and 54,651

Step by Step Solution

1. Step 1: Write the proportion equation
   143,400.72 : 215,096.22 = 54,651 : x
2. Step 2: Convert to fraction form
   143,400.72/215,096.22 = 54,651/x
3. Step 3: Cross multiply
   143,400.72x = 215,096.22 × 54,651
4. Step 4: Simplify right side
   143,400.72x = 11,755,223,519.22
5. Step 5: Solve for x
   x = 11,755,223,519.22/143,400.72
6. Step 6: Final answer
   x = 81,974.65