Finding the Fourth Proportional to 1,402.33, 1,934.78 and 812.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.33 : 1,934.78 = 812.75 : x
2. Step 2: Convert to fraction form
   1,402.33/1,934.78 = 812.75/x
3. Step 3: Cross multiply
   1,402.33x = 1,934.78 × 812.75
4. Step 4: Simplify right side
   1,402.33x = 1,572,492.45
5. Step 5: Solve for x
   x = 1,572,492.45/1,402.33
6. Step 6: Final answer
   x = 1,121.34