Finding the Fourth Proportional to 57,530.24, 79,386.32 and 42,431.12

Step by Step Solution

1. Step 1: Write the proportion equation
   57,530.24 : 79,386.32 = 42,431.12 : x
2. Step 2: Convert to fraction form
   57,530.24/79,386.32 = 42,431.12/x
3. Step 3: Cross multiply
   57,530.24x = 79,386.32 × 42,431.12
4. Step 4: Simplify right side
   57,530.24x = 3,368,450,470.28
5. Step 5: Solve for x
   x = 3,368,450,470.28/57,530.24
6. Step 6: Final answer
   x = 58,550.95