Finding the Fourth Proportional to 2,426.63, 3,639.92 and 1,038.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.63 : 3,639.92 = 1,038.79 : x
2. Step 2: Convert to fraction form
   2,426.63/3,639.92 = 1,038.79/x
3. Step 3: Cross multiply
   2,426.63x = 3,639.92 × 1,038.79
4. Step 4: Simplify right side
   2,426.63x = 3,781,112.50
5. Step 5: Solve for x
   x = 3,781,112.50/2,426.63
6. Step 6: Final answer
   x = 1,558.17