Finding the Fourth Proportional to 14,089.84, 21,128.82 and 5,764.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,089.84 : 21,128.82 = 5,764.12 : x
2. Step 2: Convert to fraction form
   14,089.84/21,128.82 = 5,764.12/x
3. Step 3: Cross multiply
   14,089.84x = 21,128.82 × 5,764.12
4. Step 4: Simplify right side
   14,089.84x = 121,789,053.94
5. Step 5: Solve for x
   x = 121,789,053.94/14,089.84
6. Step 6: Final answer
   x = 8,643.75