Finding the Fourth Proportional to 2,581.32, 3,868.46 and 1,191.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.32 : 3,868.46 = 1,191.60 : x
2. Step 2: Convert to fraction form
   2,581.32/3,868.46 = 1,191.60/x
3. Step 3: Cross multiply
   2,581.32x = 3,868.46 × 1,191.60
4. Step 4: Simplify right side
   2,581.32x = 4,609,656.94
5. Step 5: Solve for x
   x = 4,609,656.94/2,581.32
6. Step 6: Final answer
   x = 1,785.78