Finding the Fourth Proportional to 21,492.67, 29,659.90 and 12,061.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,492.67 : 29,659.90 = 12,061.23 : x
2. Step 2: Convert to fraction form
   21,492.67/29,659.90 = 12,061.23/x
3. Step 3: Cross multiply
   21,492.67x = 29,659.90 × 12,061.23
4. Step 4: Simplify right side
   21,492.67x = 357,734,845.52
5. Step 5: Solve for x
   x = 357,734,845.52/21,492.67
6. Step 6: Final answer
   x = 16,644.51