Finding the Fourth Proportional to 1,401.60, 1,933.75 and 812.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.60 : 1,933.75 = 812.02 : x
2. Step 2: Convert to fraction form
   1,401.60/1,933.75 = 812.02/x
3. Step 3: Cross multiply
   1,401.60x = 1,933.75 × 812.02
4. Step 4: Simplify right side
   1,401.60x = 1,570,239.86
5. Step 5: Solve for x
   x = 1,570,239.86/1,401.60
6. Step 6: Final answer
   x = 1,120.32