Finding the Fourth Proportional to 72,785.92, 109,174.56 and 42,817

Step by Step Solution

1. Step 1: Write the proportion equation
   72,785.92 : 109,174.56 = 42,817 : x
2. Step 2: Convert to fraction form
   72,785.92/109,174.56 = 42,817/x
3. Step 3: Cross multiply
   72,785.92x = 109,174.56 × 42,817
4. Step 4: Simplify right side
   72,785.92x = 4,674,527,135.52
5. Step 5: Solve for x
   x = 4,674,527,135.52/72,785.92
6. Step 6: Final answer
   x = 64,222.96