Finding the Fourth Proportional to 2,808.72, 3,876.93 and 1,865.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.72 : 3,876.93 = 1,865.34 : x
2. Step 2: Convert to fraction form
   2,808.72/3,876.93 = 1,865.34/x
3. Step 3: Cross multiply
   2,808.72x = 3,876.93 × 1,865.34
4. Step 4: Simplify right side
   2,808.72x = 7,231,792.61
5. Step 5: Solve for x
   x = 7,231,792.61/2,808.72
6. Step 6: Final answer
   x = 2,574.76