Finding the Fourth Proportional to 2,809.41, 3,876.15 and 1,813.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,809.41 : 3,876.15 = 1,813.78 : x
2. Step 2: Convert to fraction form
   2,809.41/3,876.15 = 1,813.78/x
3. Step 3: Cross multiply
   2,809.41x = 3,876.15 × 1,813.78
4. Step 4: Simplify right side
   2,809.41x = 7,030,483.35
5. Step 5: Solve for x
   x = 7,030,483.35/2,809.41
6. Step 6: Final answer
   x = 2,502.48