Finding the Fourth Proportional to 1,010.15, 1,393.98 and 568.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.15 : 1,393.98 = 568.15 : x
2. Step 2: Convert to fraction form
   1,010.15/1,393.98 = 568.15/x
3. Step 3: Cross multiply
   1,010.15x = 1,393.98 × 568.15
4. Step 4: Simplify right side
   1,010.15x = 791,982.77
5. Step 5: Solve for x
   x = 791,982.77/1,010.15
6. Step 6: Final answer
   x = 784.02