Finding the Fourth Proportional to 23,569.32, 32,521 and 13,221.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,569.32 : 32,521 = 13,221.40 : x
2. Step 2: Convert to fraction form
   23,569.32/32,521 = 13,221.40/x
3. Step 3: Cross multiply
   23,569.32x = 32,521 × 13,221.40
4. Step 4: Simplify right side
   23,569.32x = 429,973,149.40
5. Step 5: Solve for x
   x = 429,973,149.40/23,569.32
6. Step 6: Final answer
   x = 18,242.92