Finding the Fourth Proportional to 1,432.89, 1,978.29 and 961.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.89 : 1,978.29 = 961.47 : x
2. Step 2: Convert to fraction form
   1,432.89/1,978.29 = 961.47/x
3. Step 3: Cross multiply
   1,432.89x = 1,978.29 × 961.47
4. Step 4: Simplify right side
   1,432.89x = 1,902,066.49
5. Step 5: Solve for x
   x = 1,902,066.49/1,432.89
6. Step 6: Final answer
   x = 1,327.43