Finding the Fourth Proportional to 2,499.12, 3,746.64 and 1,039.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.12 : 3,746.64 = 1,039.32 : x
2. Step 2: Convert to fraction form
   2,499.12/3,746.64 = 1,039.32/x
3. Step 3: Cross multiply
   2,499.12x = 3,746.64 × 1,039.32
4. Step 4: Simplify right side
   2,499.12x = 3,893,957.88
5. Step 5: Solve for x
   x = 3,893,957.88/2,499.12
6. Step 6: Final answer
   x = 1,558.13