Finding the Fourth Proportional to 12,678.39, 17,498.01 and 7,376.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,678.39 : 17,498.01 = 7,376.13 : x
2. Step 2: Convert to fraction form
   12,678.39/17,498.01 = 7,376.13/x
3. Step 3: Cross multiply
   12,678.39x = 17,498.01 × 7,376.13
4. Step 4: Simplify right side
   12,678.39x = 129,067,596.50
5. Step 5: Solve for x
   x = 129,067,596.50/12,678.39
6. Step 6: Final answer
   x = 10,180.13