Finding the Fourth Proportional to 1,561.32, 2,340.81 and 738.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.32 : 2,340.81 = 738.77 : x
2. Step 2: Convert to fraction form
   1,561.32/2,340.81 = 738.77/x
3. Step 3: Cross multiply
   1,561.32x = 2,340.81 × 738.77
4. Step 4: Simplify right side
   1,561.32x = 1,729,308.50
5. Step 5: Solve for x
   x = 1,729,308.50/1,561.32
6. Step 6: Final answer
   x = 1,107.59