Finding the Fourth Proportional to 1,053.72, 1,454.14 and 611.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.72 : 1,454.14 = 611.89 : x
2. Step 2: Convert to fraction form
   1,053.72/1,454.14 = 611.89/x
3. Step 3: Cross multiply
   1,053.72x = 1,454.14 × 611.89
4. Step 4: Simplify right side
   1,053.72x = 889,773.72
5. Step 5: Solve for x
   x = 889,773.72/1,053.72
6. Step 6: Final answer
   x = 844.41