Finding the Fourth Proportional to 21,520.25, 29,699.46 and 12,088.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,520.25 : 29,699.46 = 12,088.82 : x
2. Step 2: Convert to fraction form
   21,520.25/29,699.46 = 12,088.82/x
3. Step 3: Cross multiply
   21,520.25x = 29,699.46 × 12,088.82
4. Step 4: Simplify right side
   21,520.25x = 359,031,426.04
5. Step 5: Solve for x
   x = 359,031,426.04/21,520.25
6. Step 6: Final answer
   x = 16,683.42