Finding the Fourth Proportional to 2,641.07, 3,955.76 and 1,806.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.07 : 3,955.76 = 1,806.15 : x
2. Step 2: Convert to fraction form
   2,641.07/3,955.76 = 1,806.15/x
3. Step 3: Cross multiply
   2,641.07x = 3,955.76 × 1,806.15
4. Step 4: Simplify right side
   2,641.07x = 7,144,707.86
5. Step 5: Solve for x
   x = 7,144,707.86/2,641.07
6. Step 6: Final answer
   x = 2,705.23