Finding the Fourth Proportional to 2,336.71, 3,224.65 and 1,288.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,336.71 : 3,224.65 = 1,288.77 : x
2. Step 2: Convert to fraction form
   2,336.71/3,224.65 = 1,288.77/x
3. Step 3: Cross multiply
   2,336.71x = 3,224.65 × 1,288.77
4. Step 4: Simplify right side
   2,336.71x = 4,155,837.02
5. Step 5: Solve for x
   x = 4,155,837.02/2,336.71
6. Step 6: Final answer
   x = 1,778.50