Finding the Fourth Proportional to 21,152.65, 29,193.27 and 12,200.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,152.65 : 29,193.27 = 12,200.17 : x
2. Step 2: Convert to fraction form
   21,152.65/29,193.27 = 12,200.17/x
3. Step 3: Cross multiply
   21,152.65x = 29,193.27 × 12,200.17
4. Step 4: Simplify right side
   21,152.65x = 356,162,856.86
5. Step 5: Solve for x
   x = 356,162,856.86/21,152.65
6. Step 6: Final answer
   x = 16,837.74