Finding the Fourth Proportional to 81,274.41, 111,909.47 and 71,146.17

Step by Step Solution

1. Step 1: Write the proportion equation
   81,274.41 : 111,909.47 = 71,146.17 : x
2. Step 2: Convert to fraction form
   81,274.41/111,909.47 = 71,146.17/x
3. Step 3: Cross multiply
   81,274.41x = 111,909.47 × 71,146.17
4. Step 4: Simplify right side
   81,274.41x = 7,961,929,821.50
5. Step 5: Solve for x
   x = 7,961,929,821.50/81,274.41
6. Step 6: Final answer
   x = 97,963.55