Finding the Fourth Proportional to 12,679.88, 17,498.30 and 7,378.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,679.88 : 17,498.30 = 7,378.29 : x
2. Step 2: Convert to fraction form
   12,679.88/17,498.30 = 7,378.29/x
3. Step 3: Cross multiply
   12,679.88x = 17,498.30 × 7,378.29
4. Step 4: Simplify right side
   12,679.88x = 129,107,495.02
5. Step 5: Solve for x
   x = 129,107,495.02/12,679.88
6. Step 6: Final answer
   x = 10,182.08