Finding the Fourth Proportional to 10,402.57, 15,605.34 and 3,380.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,402.57 : 15,605.34 = 3,380.32 : x
2. Step 2: Convert to fraction form
   10,402.57/15,605.34 = 3,380.32/x
3. Step 3: Cross multiply
   10,402.57x = 15,605.34 × 3,380.32
4. Step 4: Simplify right side
   10,402.57x = 52,751,042.91
5. Step 5: Solve for x
   x = 52,751,042.91/10,402.57
6. Step 6: Final answer
   x = 5,070.96