Finding the Fourth Proportional to 2,247.60, 3,370.32 and 786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,247.60 : 3,370.32 = 786.72 : x
2. Step 2: Convert to fraction form
   2,247.60/3,370.32 = 786.72/x
3. Step 3: Cross multiply
   2,247.60x = 3,370.32 × 786.72
4. Step 4: Simplify right side
   2,247.60x = 2,651,498.15
5. Step 5: Solve for x
   x = 2,651,498.15/2,247.60
6. Step 6: Final answer
   x = 1,179.70