Finding the Fourth Proportional to 2,645.86, 3,967.71 and 1,185.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.86 : 3,967.71 = 1,185.70 : x
2. Step 2: Convert to fraction form
   2,645.86/3,967.71 = 1,185.70/x
3. Step 3: Cross multiply
   2,645.86x = 3,967.71 × 1,185.70
4. Step 4: Simplify right side
   2,645.86x = 4,704,513.75
5. Step 5: Solve for x
   x = 4,704,513.75/2,645.86
6. Step 6: Final answer
   x = 1,778.07