Finding the Fourth Proportional to 38,718.72, 58,086.66 and 13,760.28

Step by Step Solution

1. Step 1: Write the proportion equation
   38,718.72 : 58,086.66 = 13,760.28 : x
2. Step 2: Convert to fraction form
   38,718.72/58,086.66 = 13,760.28/x
3. Step 3: Cross multiply
   38,718.72x = 58,086.66 × 13,760.28
4. Step 4: Simplify right side
   38,718.72x = 799,288,705.86
5. Step 5: Solve for x
   x = 799,288,705.86/38,718.72
6. Step 6: Final answer
   x = 20,643.47