Finding the Fourth Proportional to 2,356.68, 3,251.88 and 1,308.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,356.68 : 3,251.88 = 1,308.72 : x
2. Step 2: Convert to fraction form
   2,356.68/3,251.88 = 1,308.72/x
3. Step 3: Cross multiply
   2,356.68x = 3,251.88 × 1,308.72
4. Step 4: Simplify right side
   2,356.68x = 4,255,800.39
5. Step 5: Solve for x
   x = 4,255,800.39/2,356.68
6. Step 6: Final answer
   x = 1,805.85