Finding the Fourth Proportional to 66,347.30, 91,534.15 and 42,470.12

Step by Step Solution

1. Step 1: Write the proportion equation
   66,347.30 : 91,534.15 = 42,470.12 : x
2. Step 2: Convert to fraction form
   66,347.30/91,534.15 = 42,470.12/x
3. Step 3: Cross multiply
   66,347.30x = 91,534.15 × 42,470.12
4. Step 4: Simplify right side
   66,347.30x = 3,887,466,616.52
5. Step 5: Solve for x
   x = 3,887,466,616.52/66,347.30
6. Step 6: Final answer
   x = 58,592.69