Finding the Fourth Proportional to 156,636.50, 216,106.90 and 88,646.72

Step by Step Solution

1. Step 1: Write the proportion equation
   156,636.50 : 216,106.90 = 88,646.72 : x
2. Step 2: Convert to fraction form
   156,636.50/216,106.90 = 88,646.72/x
3. Step 3: Cross multiply
   156,636.50x = 216,106.90 × 88,646.72
4. Step 4: Simplify right side
   156,636.50x = 19,157,167,854.37
5. Step 5: Solve for x
   x = 19,157,167,854.37/156,636.50
6. Step 6: Final answer
   x = 122,303.34