Finding the Fourth Proportional to 1,401.59, 1,933.76 and 812.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.59 : 1,933.76 = 812.01 : x
2. Step 2: Convert to fraction form
   1,401.59/1,933.76 = 812.01/x
3. Step 3: Cross multiply
   1,401.59x = 1,933.76 × 812.01
4. Step 4: Simplify right side
   1,401.59x = 1,570,237.88
5. Step 5: Solve for x
   x = 1,570,237.88/1,401.59
6. Step 6: Final answer
   x = 1,120.33