Finding the Fourth Proportional to 1,432.56, 1,977.03 and 803.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.56 : 1,977.03 = 803.15 : x
2. Step 2: Convert to fraction form
   1,432.56/1,977.03 = 803.15/x
3. Step 3: Cross multiply
   1,432.56x = 1,977.03 × 803.15
4. Step 4: Simplify right side
   1,432.56x = 1,587,851.64
5. Step 5: Solve for x
   x = 1,587,851.64/1,432.56
6. Step 6: Final answer
   x = 1,108.40