Finding the Fourth Proportional to 21,499.62, 29,672.49 and 12,551.95

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499.62 : 29,672.49 = 12,551.95 : x
2. Step 2: Convert to fraction form
   21,499.62/29,672.49 = 12,551.95/x
3. Step 3: Cross multiply
   21,499.62x = 29,672.49 × 12,551.95
4. Step 4: Simplify right side
   21,499.62x = 372,447,610.86
5. Step 5: Solve for x
   x = 372,447,610.86/21,499.62
6. Step 6: Final answer
   x = 17,323.45