Finding the Fourth Proportional to 5,109.03, 7,659.64 and 2,642.27

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.03 : 7,659.64 = 2,642.27 : x
2. Step 2: Convert to fraction form
   5,109.03/7,659.64 = 2,642.27/x
3. Step 3: Cross multiply
   5,109.03x = 7,659.64 × 2,642.27
4. Step 4: Simplify right side
   5,109.03x = 20,238,836.98
5. Step 5: Solve for x
   x = 20,238,836.98/5,109.03
6. Step 6: Final answer
   x = 3,961.39