Finding the Fourth Proportional to 1,404.42, 1,938.10 and 806.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.42 : 1,938.10 = 806.96 : x
2. Step 2: Convert to fraction form
   1,404.42/1,938.10 = 806.96/x
3. Step 3: Cross multiply
   1,404.42x = 1,938.10 × 806.96
4. Step 4: Simplify right side
   1,404.42x = 1,563,957.47
5. Step 5: Solve for x
   x = 1,563,957.47/1,404.42
6. Step 6: Final answer
   x = 1,113.60