Finding the Fourth Proportional to 17,990.69, 24,818.69 and 11,700.77

Step by Step Solution

1. Step 1: Write the proportion equation
   17,990.69 : 24,818.69 = 11,700.77 : x
2. Step 2: Convert to fraction form
   17,990.69/24,818.69 = 11,700.77/x
3. Step 3: Cross multiply
   17,990.69x = 24,818.69 × 11,700.77
4. Step 4: Simplify right side
   17,990.69x = 290,397,724.89
5. Step 5: Solve for x
   x = 290,397,724.89/17,990.69
6. Step 6: Final answer
   x = 16,141.56