Finding the Fourth Proportional to 16,487.32, 24,739.10 and 7,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,487.32 : 24,739.10 = 7,720.72 : x
2. Step 2: Convert to fraction form
   16,487.32/24,739.10 = 7,720.72/x
3. Step 3: Cross multiply
   16,487.32x = 24,739.10 × 7,720.72
4. Step 4: Simplify right side
   16,487.32x = 191,003,664.15
5. Step 5: Solve for x
   x = 191,003,664.15/16,487.32
6. Step 6: Final answer
   x = 11,584.88