Finding the Fourth Proportional to 16,488.32, 24,740.60 and 7,721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,488.32 : 24,740.60 = 7,721.72 : x
2. Step 2: Convert to fraction form
   16,488.32/24,740.60 = 7,721.72/x
3. Step 3: Cross multiply
   16,488.32x = 24,740.60 × 7,721.72
4. Step 4: Simplify right side
   16,488.32x = 191,039,985.83
5. Step 5: Solve for x
   x = 191,039,985.83/16,488.32
6. Step 6: Final answer
   x = 11,586.38