Finding the Fourth Proportional to 1,033.72, 1,426.10 and 619.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,033.72 : 1,426.10 = 619.72 : x
2. Step 2: Convert to fraction form
   1,033.72/1,426.10 = 619.72/x
3. Step 3: Cross multiply
   1,033.72x = 1,426.10 × 619.72
4. Step 4: Simplify right side
   1,033.72x = 883,782.69
5. Step 5: Solve for x
   x = 883,782.69/1,033.72
6. Step 6: Final answer
   x = 854.95