Finding the Fourth Proportional to 1,432.71, 1,976.81 and 1,039.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.71 : 1,976.81 = 1,039.05 : x
2. Step 2: Convert to fraction form
   1,432.71/1,976.81 = 1,039.05/x
3. Step 3: Cross multiply
   1,432.71x = 1,976.81 × 1,039.05
4. Step 4: Simplify right side
   1,432.71x = 2,053,999.24
5. Step 5: Solve for x
   x = 2,053,999.24/1,432.71
6. Step 6: Final answer
   x = 1,433.65