Finding the Fourth Proportional to 1,401.72, 1,935.02 and 812.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.72 : 1,935.02 = 812.14 : x
2. Step 2: Convert to fraction form
   1,401.72/1,935.02 = 812.14/x
3. Step 3: Cross multiply
   1,401.72x = 1,935.02 × 812.14
4. Step 4: Simplify right side
   1,401.72x = 1,571,507.14
5. Step 5: Solve for x
   x = 1,571,507.14/1,401.72
6. Step 6: Final answer
   x = 1,121.13