Finding the Fourth Proportional to 39,802.52, 59,689.91 and 13,142.81

Step by Step Solution

1. Step 1: Write the proportion equation
   39,802.52 : 59,689.91 = 13,142.81 : x
2. Step 2: Convert to fraction form
   39,802.52/59,689.91 = 13,142.81/x
3. Step 3: Cross multiply
   39,802.52x = 59,689.91 × 13,142.81
4. Step 4: Simplify right side
   39,802.52x = 784,492,781.88
5. Step 5: Solve for x
   x = 784,492,781.88/39,802.52
6. Step 6: Final answer
   x = 19,709.63