Finding the Fourth Proportional to 1,402.36, 1,935.08 and 812.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.36 : 1,935.08 = 812.81 : x
2. Step 2: Convert to fraction form
   1,402.36/1,935.08 = 812.81/x
3. Step 3: Cross multiply
   1,402.36x = 1,935.08 × 812.81
4. Step 4: Simplify right side
   1,402.36x = 1,572,848.31
5. Step 5: Solve for x
   x = 1,572,848.31/1,402.36
6. Step 6: Final answer
   x = 1,121.58