Finding the Fourth Proportional to 113,096.63, 156,003.90 and 81,308.18

Step by Step Solution

1. Step 1: Write the proportion equation
   113,096.63 : 156,003.90 = 81,308.18 : x
2. Step 2: Convert to fraction form
   113,096.63/156,003.90 = 81,308.18/x
3. Step 3: Cross multiply
   113,096.63x = 156,003.90 × 81,308.18
4. Step 4: Simplify right side
   113,096.63x = 12,684,393,181.90
5. Step 5: Solve for x
   x = 12,684,393,181.90/113,096.63
6. Step 6: Final answer
   x = 112,155.36