Finding the Fourth Proportional to 1,016.31, 1,402.51 and 550.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.31 : 1,402.51 = 550.56 : x
2. Step 2: Convert to fraction form
   1,016.31/1,402.51 = 550.56/x
3. Step 3: Cross multiply
   1,016.31x = 1,402.51 × 550.56
4. Step 4: Simplify right side
   1,016.31x = 772,165.91
5. Step 5: Solve for x
   x = 772,165.91/1,016.31
6. Step 6: Final answer
   x = 759.77