Finding the Fourth Proportional to 2,632.95, 3,947.31 and 1,808.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.95 : 3,947.31 = 1,808.78 : x
2. Step 2: Convert to fraction form
   2,632.95/3,947.31 = 1,808.78/x
3. Step 3: Cross multiply
   2,632.95x = 3,947.31 × 1,808.78
4. Step 4: Simplify right side
   2,632.95x = 7,139,795.65
5. Step 5: Solve for x
   x = 7,139,795.65/2,632.95
6. Step 6: Final answer
   x = 2,711.71