Finding the Fourth Proportional to 1,401.47, 1,933.90 and 812.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.47 : 1,933.90 = 812.04 : x
2. Step 2: Convert to fraction form
   1,401.47/1,933.90 = 812.04/x
3. Step 3: Cross multiply
   1,401.47x = 1,933.90 × 812.04
4. Step 4: Simplify right side
   1,401.47x = 1,570,404.16
5. Step 5: Solve for x
   x = 1,570,404.16/1,401.47
6. Step 6: Final answer
   x = 1,120.54