Finding the Fourth Proportional to 12,617.88, 17,412.42 and 7,312.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,617.88 : 17,412.42 = 7,312.56 : x
2. Step 2: Convert to fraction form
   12,617.88/17,412.42 = 7,312.56/x
3. Step 3: Cross multiply
   12,617.88x = 17,412.42 × 7,312.56
4. Step 4: Simplify right side
   12,617.88x = 127,329,366.00
5. Step 5: Solve for x
   x = 127,329,366.00/12,617.88
6. Step 6: Final answer
   x = 10,091.19