Finding the Fourth Proportional to 2,689.78, 3,713.80 and 2,030.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,689.78 : 3,713.80 = 2,030.27 : x
2. Step 2: Convert to fraction form
   2,689.78/3,713.80 = 2,030.27/x
3. Step 3: Cross multiply
   2,689.78x = 3,713.80 × 2,030.27
4. Step 4: Simplify right side
   2,689.78x = 7,539,996.89
5. Step 5: Solve for x
   x = 7,539,996.89/2,689.78
6. Step 6: Final answer
   x = 2,803.20