Finding the Fourth Proportional to 123,117.96, 169,967.02 and 87,393.31

Step by Step Solution

1. Step 1: Write the proportion equation
   123,117.96 : 169,967.02 = 87,393.31 : x
2. Step 2: Convert to fraction form
   123,117.96/169,967.02 = 87,393.31/x
3. Step 3: Cross multiply
   123,117.96x = 169,967.02 × 87,393.31
4. Step 4: Simplify right side
   123,117.96x = 14,853,980,790.34
5. Step 5: Solve for x
   x = 14,853,980,790.34/123,117.96
6. Step 6: Final answer
   x = 120,648.37