Finding the Fourth Proportional to 1,061.03, 1,464.01 and 612.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.03 : 1,464.01 = 612.80 : x
2. Step 2: Convert to fraction form
   1,061.03/1,464.01 = 612.80/x
3. Step 3: Cross multiply
   1,061.03x = 1,464.01 × 612.80
4. Step 4: Simplify right side
   1,061.03x = 897,141.97
5. Step 5: Solve for x
   x = 897,141.97/1,061.03
6. Step 6: Final answer
   x = 845.54