Finding the Fourth Proportional to 1,012.89, 1,517.31 and 464.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.89 : 1,517.31 = 464.31 : x
2. Step 2: Convert to fraction form
   1,012.89/1,517.31 = 464.31/x
3. Step 3: Cross multiply
   1,012.89x = 1,517.31 × 464.31
4. Step 4: Simplify right side
   1,012.89x = 704,502.21
5. Step 5: Solve for x
   x = 704,502.21/1,012.89
6. Step 6: Final answer
   x = 695.54