Finding the Fourth Proportional to 113,508.31, 156,641.47 and 65,789.34

Step by Step Solution

1. Step 1: Write the proportion equation
   113,508.31 : 156,641.47 = 65,789.34 : x
2. Step 2: Convert to fraction form
   113,508.31/156,641.47 = 65,789.34/x
3. Step 3: Cross multiply
   113,508.31x = 156,641.47 × 65,789.34
4. Step 4: Simplify right side
   113,508.31x = 10,305,338,927.93
5. Step 5: Solve for x
   x = 10,305,338,927.93/113,508.31
6. Step 6: Final answer
   x = 90,789.29