Finding the Fourth Proportional to 21,275.18, 29,355.30 and 12,322.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,275.18 : 29,355.30 = 12,322.15 : x
2. Step 2: Convert to fraction form
   21,275.18/29,355.30 = 12,322.15/x
3. Step 3: Cross multiply
   21,275.18x = 29,355.30 × 12,322.15
4. Step 4: Simplify right side
   21,275.18x = 361,720,290.30
5. Step 5: Solve for x
   x = 361,720,290.30/21,275.18
6. Step 6: Final answer
   x = 17,001.99