Finding the Fourth Proportional to 21,109.44, 29,111.76 and 18,124.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.44 : 29,111.76 = 18,124.32 : x
2. Step 2: Convert to fraction form
   21,109.44/29,111.76 = 18,124.32/x
3. Step 3: Cross multiply
   21,109.44x = 29,111.76 × 18,124.32
4. Step 4: Simplify right side
   21,109.44x = 527,630,854.00
5. Step 5: Solve for x
   x = 527,630,854.00/21,109.44
6. Step 6: Final answer
   x = 24,995.02