Finding the Fourth Proportional to 1,053.81, 1,454.27 and 581.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.81 : 1,454.27 = 581.72 : x
2. Step 2: Convert to fraction form
   1,053.81/1,454.27 = 581.72/x
3. Step 3: Cross multiply
   1,053.81x = 1,454.27 × 581.72
4. Step 4: Simplify right side
   1,053.81x = 845,980.13
5. Step 5: Solve for x
   x = 845,980.13/1,053.81
6. Step 6: Final answer
   x = 802.78