Finding the Fourth Proportional to 1,432.86, 1,976.88 and 803.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.86 : 1,976.88 = 803.30 : x
2. Step 2: Convert to fraction form
   1,432.86/1,976.88 = 803.30/x
3. Step 3: Cross multiply
   1,432.86x = 1,976.88 × 803.30
4. Step 4: Simplify right side
   1,432.86x = 1,588,027.70
5. Step 5: Solve for x
   x = 1,588,027.70/1,432.86
6. Step 6: Final answer
   x = 1,108.29