Finding the Fourth Proportional to 1,053.90, 1,454.72 and 722.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.90 : 1,454.72 = 722.81 : x
2. Step 2: Convert to fraction form
   1,053.90/1,454.72 = 722.81/x
3. Step 3: Cross multiply
   1,053.90x = 1,454.72 × 722.81
4. Step 4: Simplify right side
   1,053.90x = 1,051,486.16
5. Step 5: Solve for x
   x = 1,051,486.16/1,053.90
6. Step 6: Final answer
   x = 997.71