Finding the Fourth Proportional to 113,435.36, 156,278.72 and 81,549.12

Step by Step Solution

1. Step 1: Write the proportion equation
   113,435.36 : 156,278.72 = 81,549.12 : x
2. Step 2: Convert to fraction form
   113,435.36/156,278.72 = 81,549.12/x
3. Step 3: Cross multiply
   113,435.36x = 156,278.72 × 81,549.12
4. Step 4: Simplify right side
   113,435.36x = 12,744,392,090.73
5. Step 5: Solve for x
   x = 12,744,392,090.73/113,435.36
6. Step 6: Final answer
   x = 112,349.38