Finding the Fourth Proportional to 113,507.31, 156,640.09 and 65,788.34

Step by Step Solution

1. Step 1: Write the proportion equation
   113,507.31 : 156,640.09 = 65,788.34 : x
2. Step 2: Convert to fraction form
   113,507.31/156,640.09 = 65,788.34/x
3. Step 3: Cross multiply
   113,507.31x = 156,640.09 × 65,788.34
4. Step 4: Simplify right side
   113,507.31x = 10,305,091,498.55
5. Step 5: Solve for x
   x = 10,305,091,498.55/113,507.31
6. Step 6: Final answer
   x = 90,787.91