Finding the Fourth Proportional to 89,150.18, 123,040.80 and 56,898.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,150.18 : 123,040.80 = 56,898.72 : x
2. Step 2: Convert to fraction form
   89,150.18/123,040.80 = 56,898.72/x
3. Step 3: Cross multiply
   89,150.18x = 123,040.80 × 56,898.72
4. Step 4: Simplify right side
   89,150.18x = 7,000,864,027.78
5. Step 5: Solve for x
   x = 7,000,864,027.78/89,150.18
6. Step 6: Final answer
   x = 78,528.88