Finding the Fourth Proportional to 1,060.79, 1,583.33 and 939.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.79 : 1,583.33 = 939.15 : x
2. Step 2: Convert to fraction form
   1,060.79/1,583.33 = 939.15/x
3. Step 3: Cross multiply
   1,060.79x = 1,583.33 × 939.15
4. Step 4: Simplify right side
   1,060.79x = 1,486,979.67
5. Step 5: Solve for x
   x = 1,486,979.67/1,060.79
6. Step 6: Final answer
   x = 1,401.77