Finding the Fourth Proportional to 1,011.25, 1,395.56 and 569.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.25 : 1,395.56 = 569.15 : x
2. Step 2: Convert to fraction form
   1,011.25/1,395.56 = 569.15/x
3. Step 3: Cross multiply
   1,011.25x = 1,395.56 × 569.15
4. Step 4: Simplify right side
   1,011.25x = 794,273.15
5. Step 5: Solve for x
   x = 794,273.15/1,011.25
6. Step 6: Final answer
   x = 785.44