Finding the Fourth Proportional to 13,039.80, 19,551.15 and 7,417.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,039.80 : 19,551.15 = 7,417.59 : x
2. Step 2: Convert to fraction form
   13,039.80/19,551.15 = 7,417.59/x
3. Step 3: Cross multiply
   13,039.80x = 19,551.15 × 7,417.59
4. Step 4: Simplify right side
   13,039.80x = 145,022,414.73
5. Step 5: Solve for x
   x = 145,022,414.73/13,039.80
6. Step 6: Final answer
   x = 11,121.52