Finding the Fourth Proportional to 1,017.52, 1,401.78 and 839.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.52 : 1,401.78 = 839.32 : x
2. Step 2: Convert to fraction form
   1,017.52/1,401.78 = 839.32/x
3. Step 3: Cross multiply
   1,017.52x = 1,401.78 × 839.32
4. Step 4: Simplify right side
   1,017.52x = 1,176,541.99
5. Step 5: Solve for x
   x = 1,176,541.99/1,017.52
6. Step 6: Final answer
   x = 1,156.28