Finding the Fourth Proportional to 1,401.72, 1,933.98 and 812.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.72 : 1,933.98 = 812.25 : x
2. Step 2: Convert to fraction form
   1,401.72/1,933.98 = 812.25/x
3. Step 3: Cross multiply
   1,401.72x = 1,933.98 × 812.25
4. Step 4: Simplify right side
   1,401.72x = 1,570,875.26
5. Step 5: Solve for x
   x = 1,570,875.26/1,401.72
6. Step 6: Final answer
   x = 1,120.68