Finding the Fourth Proportional to 12,739.87, 17,580.88 and 7,435.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,739.87 : 17,580.88 = 7,435.52 : x
2. Step 2: Convert to fraction form
   12,739.87/17,580.88 = 7,435.52/x
3. Step 3: Cross multiply
   12,739.87x = 17,580.88 × 7,435.52
4. Step 4: Simplify right side
   12,739.87x = 130,722,984.86
5. Step 5: Solve for x
   x = 130,722,984.86/12,739.87
6. Step 6: Final answer
   x = 10,260.94