Finding the Fourth Proportional to 162,148.72, 243,057.72 and 91,879.60

Step by Step Solution

1. Step 1: Write the proportion equation
   162,148.72 : 243,057.72 = 91,879.60 : x
2. Step 2: Convert to fraction form
   162,148.72/243,057.72 = 91,879.60/x
3. Step 3: Cross multiply
   162,148.72x = 243,057.72 × 91,879.60
4. Step 4: Simplify right side
   162,148.72x = 22,332,046,090.51
5. Step 5: Solve for x
   x = 22,332,046,090.51/162,148.72
6. Step 6: Final answer
   x = 137,725.70