Finding the Fourth Proportional to 12,387.68, 17,098.05 and 7,608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.68 : 17,098.05 = 7,608.78 : x
2. Step 2: Convert to fraction form
   12,387.68/17,098.05 = 7,608.78/x
3. Step 3: Cross multiply
   12,387.68x = 17,098.05 × 7,608.78
4. Step 4: Simplify right side
   12,387.68x = 130,095,300.88
5. Step 5: Solve for x
   x = 130,095,300.88/12,387.68
6. Step 6: Final answer
   x = 10,501.99