Finding the Fourth Proportional to 21,531.72, 32,312.34 and 8,384.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,531.72 : 32,312.34 = 8,384.16 : x
2. Step 2: Convert to fraction form
   21,531.72/32,312.34 = 8,384.16/x
3. Step 3: Cross multiply
   21,531.72x = 32,312.34 × 8,384.16
4. Step 4: Simplify right side
   21,531.72x = 270,911,828.53
5. Step 5: Solve for x
   x = 270,911,828.53/21,531.72
6. Step 6: Final answer
   x = 12,581.99