Finding the Fourth Proportional to 12,385.74, 17,086.63 and 7,907.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.74 : 17,086.63 = 7,907.25 : x
2. Step 2: Convert to fraction form
   12,385.74/17,086.63 = 7,907.25/x
3. Step 3: Cross multiply
   12,385.74x = 17,086.63 × 7,907.25
4. Step 4: Simplify right side
   12,385.74x = 135,108,255.07
5. Step 5: Solve for x
   x = 135,108,255.07/12,385.74
6. Step 6: Final answer
   x = 10,908.37