Finding the Fourth Proportional to 16,405.40, 24,608.86 and 5,312.96

Step by Step Solution

1. Step 1: Write the proportion equation
   16,405.40 : 24,608.86 = 5,312.96 : x
2. Step 2: Convert to fraction form
   16,405.40/24,608.86 = 5,312.96/x
3. Step 3: Cross multiply
   16,405.40x = 24,608.86 × 5,312.96
4. Step 4: Simplify right side
   16,405.40x = 130,745,888.83
5. Step 5: Solve for x
   x = 130,745,888.83/16,405.40
6. Step 6: Final answer
   x = 7,969.69