Finding the Fourth Proportional to 156,478.86, 215,949.96 and 88,501.86

Step by Step Solution

1. Step 1: Write the proportion equation
   156,478.86 : 215,949.96 = 88,501.86 : x
2. Step 2: Convert to fraction form
   156,478.86/215,949.96 = 88,501.86/x
3. Step 3: Cross multiply
   156,478.86x = 215,949.96 × 88,501.86
4. Step 4: Simplify right side
   156,478.86x = 19,111,973,126.93
5. Step 5: Solve for x
   x = 19,111,973,126.93/156,478.86
6. Step 6: Final answer
   x = 122,137.73