Finding the Fourth Proportional to 1,947.15, 2,906.87 and 1,878.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.15 : 2,906.87 = 1,878.81 : x
2. Step 2: Convert to fraction form
   1,947.15/2,906.87 = 1,878.81/x
3. Step 3: Cross multiply
   1,947.15x = 2,906.87 × 1,878.81
4. Step 4: Simplify right side
   1,947.15x = 5,461,447.03
5. Step 5: Solve for x
   x = 5,461,447.03/1,947.15
6. Step 6: Final answer
   x = 2,804.84