Finding the Fourth Proportional to 89,793.28, 134,678.56 and 56,411.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,793.28 : 134,678.56 = 56,411.56 : x
2. Step 2: Convert to fraction form
   89,793.28/134,678.56 = 56,411.56/x
3. Step 3: Cross multiply
   89,793.28x = 134,678.56 × 56,411.56
4. Step 4: Simplify right side
   89,793.28x = 7,597,427,668.15
5. Step 5: Solve for x
   x = 7,597,427,668.15/89,793.28
6. Step 6: Final answer
   x = 84,610.20