Finding the Fourth Proportional to 17,690.40, 24,415.43 and 10,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,690.40 : 24,415.43 = 10,620.72 : x
2. Step 2: Convert to fraction form
   17,690.40/24,415.43 = 10,620.72/x
3. Step 3: Cross multiply
   17,690.40x = 24,415.43 × 10,620.72
4. Step 4: Simplify right side
   17,690.40x = 259,309,392.61
5. Step 5: Solve for x
   x = 259,309,392.61/17,690.40
6. Step 6: Final answer
   x = 14,658.20