Finding the Fourth Proportional to 156,111.93, 215,417.91 and 88,124.60

Step by Step Solution

1. Step 1: Write the proportion equation
   156,111.93 : 215,417.91 = 88,124.60 : x
2. Step 2: Convert to fraction form
   156,111.93/215,417.91 = 88,124.60/x
3. Step 3: Cross multiply
   156,111.93x = 215,417.91 × 88,124.60
4. Step 4: Simplify right side
   156,111.93x = 18,983,615,762.39
5. Step 5: Solve for x
   x = 18,983,615,762.39/156,111.93
6. Step 6: Final answer
   x = 121,602.59