Finding the Fourth Proportional to 21,492.58, 29,659.80 and 12,061.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,492.58 : 29,659.80 = 12,061.12 : x
2. Step 2: Convert to fraction form
   21,492.58/29,659.80 = 12,061.12/x
3. Step 3: Cross multiply
   21,492.58x = 29,659.80 × 12,061.12
4. Step 4: Simplify right side
   21,492.58x = 357,730,406.98
5. Step 5: Solve for x
   x = 357,730,406.98/21,492.58
6. Step 6: Final answer
   x = 16,644.37