Finding the Fourth Proportional to 1,484.58, 2,048.73 and 812.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,484.58 : 2,048.73 = 812.40 : x
2. Step 2: Convert to fraction form
   1,484.58/2,048.73 = 812.40/x
3. Step 3: Cross multiply
   1,484.58x = 2,048.73 × 812.40
4. Step 4: Simplify right side
   1,484.58x = 1,664,392.89
5. Step 5: Solve for x
   x = 1,664,392.89/1,484.58
6. Step 6: Final answer
   x = 1,121.12