Finding the Fourth Proportional to 1,432.64, 1,978.56 and 1,104.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.64 : 1,978.56 = 1,104.32 : x
2. Step 2: Convert to fraction form
   1,432.64/1,978.56 = 1,104.32/x
3. Step 3: Cross multiply
   1,432.64x = 1,978.56 × 1,104.32
4. Step 4: Simplify right side
   1,432.64x = 2,184,963.38
5. Step 5: Solve for x
   x = 2,184,963.38/1,432.64
6. Step 6: Final answer
   x = 1,525.13