Finding the Fourth Proportional to 1,402.23, 1,935.06 and 812.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.23 : 1,935.06 = 812.82 : x
2. Step 2: Convert to fraction form
   1,402.23/1,935.06 = 812.82/x
3. Step 3: Cross multiply
   1,402.23x = 1,935.06 × 812.82
4. Step 4: Simplify right side
   1,402.23x = 1,572,855.47
5. Step 5: Solve for x
   x = 1,572,855.47/1,402.23
6. Step 6: Final answer
   x = 1,121.68