Finding the Fourth Proportional to 14,280.97, 21,420.84 and 3,892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,280.97 : 21,420.84 = 3,892.72 : x
2. Step 2: Convert to fraction form
   14,280.97/21,420.84 = 3,892.72/x
3. Step 3: Cross multiply
   14,280.97x = 21,420.84 × 3,892.72
4. Step 4: Simplify right side
   14,280.97x = 83,385,332.28
5. Step 5: Solve for x
   x = 83,385,332.28/14,280.97
6. Step 6: Final answer
   x = 5,838.91