Finding the Fourth Proportional to 1,010.70, 1,394.78 and 568.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.70 : 1,394.78 = 568.61 : x
2. Step 2: Convert to fraction form
   1,010.70/1,394.78 = 568.61/x
3. Step 3: Cross multiply
   1,010.70x = 1,394.78 × 568.61
4. Step 4: Simplify right side
   1,010.70x = 793,076.04
5. Step 5: Solve for x
   x = 793,076.04/1,010.70
6. Step 6: Final answer
   x = 784.68