Finding the Fourth Proportional to 1,061.21, 1,464.48 and 619.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.21 : 1,464.48 = 619.14 : x
2. Step 2: Convert to fraction form
   1,061.21/1,464.48 = 619.14/x
3. Step 3: Cross multiply
   1,061.21x = 1,464.48 × 619.14
4. Step 4: Simplify right side
   1,061.21x = 906,718.15
5. Step 5: Solve for x
   x = 906,718.15/1,061.21
6. Step 6: Final answer
   x = 854.42