Finding the Fourth Proportional to 57,288.64, 79,036.62 and 42,217.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,288.64 : 79,036.62 = 42,217.25 : x
2. Step 2: Convert to fraction form
   57,288.64/79,036.62 = 42,217.25/x
3. Step 3: Cross multiply
   57,288.64x = 79,036.62 × 42,217.25
4. Step 4: Simplify right side
   57,288.64x = 3,336,708,192.20
5. Step 5: Solve for x
   x = 3,336,708,192.20/57,288.64
6. Step 6: Final answer
   x = 58,243.81