Finding the Fourth Proportional to 1,061.33, 1,464.64 and 619.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.33 : 1,464.64 = 619.15 : x
2. Step 2: Convert to fraction form
   1,061.33/1,464.64 = 619.15/x
3. Step 3: Cross multiply
   1,061.33x = 1,464.64 × 619.15
4. Step 4: Simplify right side
   1,061.33x = 906,829.07
5. Step 5: Solve for x
   x = 906,829.07/1,061.33
6. Step 6: Final answer
   x = 854.43