Finding the Fourth Proportional to 156,007.89, 215,290.98 and 88,039.35

Step by Step Solution

1. Step 1: Write the proportion equation
   156,007.89 : 215,290.98 = 88,039.35 : x
2. Step 2: Convert to fraction form
   156,007.89/215,290.98 = 88,039.35/x
3. Step 3: Cross multiply
   156,007.89x = 215,290.98 × 88,039.35
4. Step 4: Simplify right side
   156,007.89x = 18,954,077,940.06
5. Step 5: Solve for x
   x = 18,954,077,940.06/156,007.89
6. Step 6: Final answer
   x = 121,494.35