Finding the Fourth Proportional to 2,551.86, 3,824.72 and 1,318.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.86 : 3,824.72 = 1,318.61 : x
2. Step 2: Convert to fraction form
   2,551.86/3,824.72 = 1,318.61/x
3. Step 3: Cross multiply
   2,551.86x = 3,824.72 × 1,318.61
4. Step 4: Simplify right side
   2,551.86x = 5,043,288.32
5. Step 5: Solve for x
   x = 5,043,288.32/2,551.86
6. Step 6: Final answer
   x = 1,976.32