Finding the Fourth Proportional to 1,451.25, 2,002.73 and 830.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.25 : 2,002.73 = 830.25 : x
2. Step 2: Convert to fraction form
   1,451.25/2,002.73 = 830.25/x
3. Step 3: Cross multiply
   1,451.25x = 2,002.73 × 830.25
4. Step 4: Simplify right side
   1,451.25x = 1,662,762.43
5. Step 5: Solve for x
   x = 1,662,762.43/1,451.25
6. Step 6: Final answer
   x = 1,145.75