Finding the Fourth Proportional to 1,061.15, 1,464.01 and 618.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.15 : 1,464.01 = 618.95 : x
2. Step 2: Convert to fraction form
   1,061.15/1,464.01 = 618.95/x
3. Step 3: Cross multiply
   1,061.15x = 1,464.01 × 618.95
4. Step 4: Simplify right side
   1,061.15x = 906,151.10
5. Step 5: Solve for x
   x = 906,151.10/1,061.15
6. Step 6: Final answer
   x = 853.94