Finding the Fourth Proportional to 1,909.31, 2,862.27 and 738.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.31 : 2,862.27 = 738.45 : x
2. Step 2: Convert to fraction form
   1,909.31/2,862.27 = 738.45/x
3. Step 3: Cross multiply
   1,909.31x = 2,862.27 × 738.45
4. Step 4: Simplify right side
   1,909.31x = 2,113,643.28
5. Step 5: Solve for x
   x = 2,113,643.28/1,909.31
6. Step 6: Final answer
   x = 1,107.02