Finding the Fourth Proportional to 1,053.68, 1,454.18 and 611.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.68 : 1,454.18 = 611.55 : x
2. Step 2: Convert to fraction form
   1,053.68/1,454.18 = 611.55/x
3. Step 3: Cross multiply
   1,053.68x = 1,454.18 × 611.55
4. Step 4: Simplify right side
   1,053.68x = 889,300.72
5. Step 5: Solve for x
   x = 889,300.72/1,053.68
6. Step 6: Final answer
   x = 844.00