Finding the Fourth Proportional to 17,660.76, 26,487.86 and 5,178.04

Step by Step Solution

1. Step 1: Write the proportion equation
   17,660.76 : 26,487.86 = 5,178.04 : x
2. Step 2: Convert to fraction form
   17,660.76/26,487.86 = 5,178.04/x
3. Step 3: Cross multiply
   17,660.76x = 26,487.86 × 5,178.04
4. Step 4: Simplify right side
   17,660.76x = 137,155,198.59
5. Step 5: Solve for x
   x = 137,155,198.59/17,660.76
6. Step 6: Final answer
   x = 7,766.10