Finding the Fourth Proportional to 1,432.80, 1,978.12 and 936.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.80 : 1,978.12 = 936.27 : x
2. Step 2: Convert to fraction form
   1,432.80/1,978.12 = 936.27/x
3. Step 3: Cross multiply
   1,432.80x = 1,978.12 × 936.27
4. Step 4: Simplify right side
   1,432.80x = 1,852,054.51
5. Step 5: Solve for x
   x = 1,852,054.51/1,432.80
6. Step 6: Final answer
   x = 1,292.61