Finding the Fourth Proportional to 1,061.34, 1,464.45 and 619.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.34 : 1,464.45 = 619.28 : x
2. Step 2: Convert to fraction form
   1,061.34/1,464.45 = 619.28/x
3. Step 3: Cross multiply
   1,061.34x = 1,464.45 × 619.28
4. Step 4: Simplify right side
   1,061.34x = 906,904.60
5. Step 5: Solve for x
   x = 906,904.60/1,061.34
6. Step 6: Final answer
   x = 854.49