Finding the Fourth Proportional to 12,491.25, 17,238.69 and 7,185.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.25 : 17,238.69 = 7,185.95 : x
2. Step 2: Convert to fraction form
   12,491.25/17,238.69 = 7,185.95/x
3. Step 3: Cross multiply
   12,491.25x = 17,238.69 × 7,185.95
4. Step 4: Simplify right side
   12,491.25x = 123,876,342.86
5. Step 5: Solve for x
   x = 123,876,342.86/12,491.25
6. Step 6: Final answer
   x = 9,917.05