Finding the Fourth Proportional to 39,417.72, 59,121 and 11,340.15

Step by Step Solution

1. Step 1: Write the proportion equation
   39,417.72 : 59,121 = 11,340.15 : x
2. Step 2: Convert to fraction form
   39,417.72/59,121 = 11,340.15/x
3. Step 3: Cross multiply
   39,417.72x = 59,121 × 11,340.15
4. Step 4: Simplify right side
   39,417.72x = 670,441,008.15
5. Step 5: Solve for x
   x = 670,441,008.15/39,417.72
6. Step 6: Final answer
   x = 17,008.62