Finding the Fourth Proportional to 21,436.94, 29,596.11 and 16,978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,436.94 : 29,596.11 = 16,978.70 : x
2. Step 2: Convert to fraction form
   21,436.94/29,596.11 = 16,978.70/x
3. Step 3: Cross multiply
   21,436.94x = 29,596.11 × 16,978.70
4. Step 4: Simplify right side
   21,436.94x = 502,503,472.86
5. Step 5: Solve for x
   x = 502,503,472.86/21,436.94
6. Step 6: Final answer
   x = 23,441.01