Finding the Fourth Proportional to 1,011.31, 1,395.71 and 563.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.31 : 1,395.71 = 563.33 : x
2. Step 2: Convert to fraction form
   1,011.31/1,395.71 = 563.33/x
3. Step 3: Cross multiply
   1,011.31x = 1,395.71 × 563.33
4. Step 4: Simplify right side
   1,011.31x = 786,245.31
5. Step 5: Solve for x
   x = 786,245.31/1,011.31
6. Step 6: Final answer
   x = 777.45