Finding the Fourth Proportional to 3,730.32, 5,139.72 and 2,486.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,730.32 : 5,139.72 = 2,486.16 : x
2. Step 2: Convert to fraction form
   3,730.32/5,139.72 = 2,486.16/x
3. Step 3: Cross multiply
   3,730.32x = 5,139.72 × 2,486.16
4. Step 4: Simplify right side
   3,730.32x = 12,778,166.28
5. Step 5: Solve for x
   x = 12,778,166.28/3,730.32
6. Step 6: Final answer
   x = 3,425.49