Finding the Fourth Proportional to 9,131.90, 13,617.67 and 9,048.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.90 : 13,617.67 = 9,048.74 : x
2. Step 2: Convert to fraction form
   9,131.90/13,617.67 = 9,048.74/x
3. Step 3: Cross multiply
   9,131.90x = 13,617.67 × 9,048.74
4. Step 4: Simplify right side
   9,131.90x = 123,222,755.24
5. Step 5: Solve for x
   x = 123,222,755.24/9,131.90
6. Step 6: Final answer
   x = 13,493.66