Finding the Fourth Proportional to 1,016.16, 1,522.08 and 939.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.16 : 1,522.08 = 939.30 : x
2. Step 2: Convert to fraction form
   1,016.16/1,522.08 = 939.30/x
3. Step 3: Cross multiply
   1,016.16x = 1,522.08 × 939.30
4. Step 4: Simplify right side
   1,016.16x = 1,429,689.74
5. Step 5: Solve for x
   x = 1,429,689.74/1,016.16
6. Step 6: Final answer
   x = 1,406.95