Finding the Fourth Proportional to 2,605.32, 3,907.78 and 756.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.32 : 3,907.78 = 756.45 : x
2. Step 2: Convert to fraction form
   2,605.32/3,907.78 = 756.45/x
3. Step 3: Cross multiply
   2,605.32x = 3,907.78 × 756.45
4. Step 4: Simplify right side
   2,605.32x = 2,956,046.98
5. Step 5: Solve for x
   x = 2,956,046.98/2,605.32
6. Step 6: Final answer
   x = 1,134.62