Finding the Fourth Proportional to 1,061.91, 1,466.15 and 812.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.91 : 1,466.15 = 812.79 : x
2. Step 2: Convert to fraction form
   1,061.91/1,466.15 = 812.79/x
3. Step 3: Cross multiply
   1,061.91x = 1,466.15 × 812.79
4. Step 4: Simplify right side
   1,061.91x = 1,191,664.73
5. Step 5: Solve for x
   x = 1,191,664.73/1,061.91
6. Step 6: Final answer
   x = 1,122.19