Finding the Fourth Proportional to 1,061.36, 1,464.76 and 619.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.36 : 1,464.76 = 619.40 : x
2. Step 2: Convert to fraction form
   1,061.36/1,464.76 = 619.40/x
3. Step 3: Cross multiply
   1,061.36x = 1,464.76 × 619.40
4. Step 4: Simplify right side
   1,061.36x = 907,272.34
5. Step 5: Solve for x
   x = 907,272.34/1,061.36
6. Step 6: Final answer
   x = 854.82