Finding the Fourth Proportional to 1,401.82, 1,934.51 and 812.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.82 : 1,934.51 = 812.70 : x
2. Step 2: Convert to fraction form
   1,401.82/1,934.51 = 812.70/x
3. Step 3: Cross multiply
   1,401.82x = 1,934.51 × 812.70
4. Step 4: Simplify right side
   1,401.82x = 1,572,176.78
5. Step 5: Solve for x
   x = 1,572,176.78/1,401.82
6. Step 6: Final answer
   x = 1,121.52