Finding the Fourth Proportional to 1,010.21, 1,394.15 and 568.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.21 : 1,394.15 = 568.10 : x
2. Step 2: Convert to fraction form
   1,010.21/1,394.15 = 568.10/x
3. Step 3: Cross multiply
   1,010.21x = 1,394.15 × 568.10
4. Step 4: Simplify right side
   1,010.21x = 792,016.62
5. Step 5: Solve for x
   x = 792,016.62/1,010.21
6. Step 6: Final answer
   x = 784.01