Finding the Fourth Proportional to 71,791.43, 99,045.52 and 71,680.71

Step by Step Solution

1. Step 1: Write the proportion equation
   71,791.43 : 99,045.52 = 71,680.71 : x
2. Step 2: Convert to fraction form
   71,791.43/99,045.52 = 71,680.71/x
3. Step 3: Cross multiply
   71,791.43x = 99,045.52 × 71,680.71
4. Step 4: Simplify right side
   71,791.43x = 7,099,653,388.14
5. Step 5: Solve for x
   x = 7,099,653,388.14/71,791.43
6. Step 6: Final answer
   x = 98,892.78