Finding the Fourth Proportional to 151,776.72, 209,458.71 and 87,266.88

Step by Step Solution

1. Step 1: Write the proportion equation
   151,776.72 : 209,458.71 = 87,266.88 : x
2. Step 2: Convert to fraction form
   151,776.72/209,458.71 = 87,266.88/x
3. Step 3: Cross multiply
   151,776.72x = 209,458.71 × 87,266.88
4. Step 4: Simplify right side
   151,776.72x = 18,278,808,110.52
5. Step 5: Solve for x
   x = 18,278,808,110.52/151,776.72
6. Step 6: Final answer
   x = 120,432.23