Finding the Fourth Proportional to 96,830.31, 133,316.91 and 81,685.34

Step by Step Solution

1. Step 1: Write the proportion equation
   96,830.31 : 133,316.91 = 81,685.34 : x
2. Step 2: Convert to fraction form
   96,830.31/133,316.91 = 81,685.34/x
3. Step 3: Cross multiply
   96,830.31x = 133,316.91 × 81,685.34
4. Step 4: Simplify right side
   96,830.31x = 10,890,037,121.10
5. Step 5: Solve for x
   x = 10,890,037,121.10/96,830.31
6. Step 6: Final answer
   x = 112,465.17