Finding the Fourth Proportional to 1,061.67, 1,464.78 and 619.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.67 : 1,464.78 = 619.28 : x
2. Step 2: Convert to fraction form
   1,061.67/1,464.78 = 619.28/x
3. Step 3: Cross multiply
   1,061.67x = 1,464.78 × 619.28
4. Step 4: Simplify right side
   1,061.67x = 907,108.96
5. Step 5: Solve for x
   x = 907,108.96/1,061.67
6. Step 6: Final answer
   x = 854.42