Finding the Fourth Proportional to 151,751.68, 209,442.88 and 88,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   151,751.68 : 209,442.88 = 88,142.72 : x
2. Step 2: Convert to fraction form
   151,751.68/209,442.88 = 88,142.72/x
3. Step 3: Cross multiply
   151,751.68x = 209,442.88 × 88,142.72
4. Step 4: Simplify right side
   151,751.68x = 18,460,865,127.83
5. Step 5: Solve for x
   x = 18,460,865,127.83/151,751.68
6. Step 6: Final answer
   x = 121,651.80