Finding the Fourth Proportional to 12,591.59, 17,377.13 and 7,288.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,591.59 : 17,377.13 = 7,288.25 : x
2. Step 2: Convert to fraction form
   12,591.59/17,377.13 = 7,288.25/x
3. Step 3: Cross multiply
   12,591.59x = 17,377.13 × 7,288.25
4. Step 4: Simplify right side
   12,591.59x = 126,648,799.06
5. Step 5: Solve for x
   x = 126,648,799.06/12,591.59
6. Step 6: Final answer
   x = 10,058.21