Finding the Fourth Proportional to 14,142.79, 21,206.05 and 5,828.55

Step by Step Solution

1. Step 1: Write the proportion equation
   14,142.79 : 21,206.05 = 5,828.55 : x
2. Step 2: Convert to fraction form
   14,142.79/21,206.05 = 5,828.55/x
3. Step 3: Cross multiply
   14,142.79x = 21,206.05 × 5,828.55
4. Step 4: Simplify right side
   14,142.79x = 123,600,522.73
5. Step 5: Solve for x
   x = 123,600,522.73/14,142.79
6. Step 6: Final answer
   x = 8,739.47