Finding the Fourth Proportional to 12,425.98, 17,138.88 and 7,118.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,425.98 : 17,138.88 = 7,118.86 : x
2. Step 2: Convert to fraction form
   12,425.98/17,138.88 = 7,118.86/x
3. Step 3: Cross multiply
   12,425.98x = 17,138.88 × 7,118.86
4. Step 4: Simplify right side
   12,425.98x = 122,009,287.28
5. Step 5: Solve for x
   x = 122,009,287.28/12,425.98
6. Step 6: Final answer
   x = 9,818.89