Finding the Fourth Proportional to 38,868.72, 58,315.26 and 13,908.18

Step by Step Solution

1. Step 1: Write the proportion equation
   38,868.72 : 58,315.26 = 13,908.18 : x
2. Step 2: Convert to fraction form
   38,868.72/58,315.26 = 13,908.18/x
3. Step 3: Cross multiply
   38,868.72x = 58,315.26 × 13,908.18
4. Step 4: Simplify right side
   38,868.72x = 811,059,132.83
5. Step 5: Solve for x
   x = 811,059,132.83/38,868.72
6. Step 6: Final answer
   x = 20,866.63