Finding the Fourth Proportional to 12,562.79, 17,336.78 and 7,259.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,562.79 : 17,336.78 = 7,259.31 : x
2. Step 2: Convert to fraction form
   12,562.79/17,336.78 = 7,259.31/x
3. Step 3: Cross multiply
   12,562.79x = 17,336.78 × 7,259.31
4. Step 4: Simplify right side
   12,562.79x = 125,853,024.13
5. Step 5: Solve for x
   x = 125,853,024.13/12,562.79
6. Step 6: Final answer
   x = 10,017.92