Finding the Fourth Proportional to 1,053.72, 1,454.23 and 581.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.72 : 1,454.23 = 581.70 : x
2. Step 2: Convert to fraction form
   1,053.72/1,454.23 = 581.70/x
3. Step 3: Cross multiply
   1,053.72x = 1,454.23 × 581.70
4. Step 4: Simplify right side
   1,053.72x = 845,925.59
5. Step 5: Solve for x
   x = 845,925.59/1,053.72
6. Step 6: Final answer
   x = 802.80