Finding the Fourth Proportional to 1,402.40, 1,935.52 and 812.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.40 : 1,935.52 = 812.96 : x
2. Step 2: Convert to fraction form
   1,402.40/1,935.52 = 812.96/x
3. Step 3: Cross multiply
   1,402.40x = 1,935.52 × 812.96
4. Step 4: Simplify right side
   1,402.40x = 1,573,500.34
5. Step 5: Solve for x
   x = 1,573,500.34/1,402.40
6. Step 6: Final answer
   x = 1,122.01