Finding the Fourth Proportional to 1,061.08, 1,464.47 and 618.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.08 : 1,464.47 = 618.98 : x
2. Step 2: Convert to fraction form
   1,061.08/1,464.47 = 618.98/x
3. Step 3: Cross multiply
   1,061.08x = 1,464.47 × 618.98
4. Step 4: Simplify right side
   1,061.08x = 906,467.22
5. Step 5: Solve for x
   x = 906,467.22/1,061.08
6. Step 6: Final answer
   x = 854.29