Finding the Fourth Proportional to 1,402.04, 1,935.24 and 812.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.04 : 1,935.24 = 812.72 : x
2. Step 2: Convert to fraction form
   1,402.04/1,935.24 = 812.72/x
3. Step 3: Cross multiply
   1,402.04x = 1,935.24 × 812.72
4. Step 4: Simplify right side
   1,402.04x = 1,572,808.25
5. Step 5: Solve for x
   x = 1,572,808.25/1,402.04
6. Step 6: Final answer
   x = 1,121.80