Finding the Fourth Proportional to 1,402.03, 1,935.46 and 812.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.03 : 1,935.46 = 812.45 : x
2. Step 2: Convert to fraction form
   1,402.03/1,935.46 = 812.45/x
3. Step 3: Cross multiply
   1,402.03x = 1,935.46 × 812.45
4. Step 4: Simplify right side
   1,402.03x = 1,572,464.48
5. Step 5: Solve for x
   x = 1,572,464.48/1,402.03
6. Step 6: Final answer
   x = 1,121.56