Finding the Fourth Proportional to 5,111.32, 7,659.72 and 3,936.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.32 : 7,659.72 = 3,936.88 : x
2. Step 2: Convert to fraction form
   5,111.32/7,659.72 = 3,936.88/x
3. Step 3: Cross multiply
   5,111.32x = 7,659.72 × 3,936.88
4. Step 4: Simplify right side
   5,111.32x = 30,155,398.47
5. Step 5: Solve for x
   x = 30,155,398.47/5,111.32
6. Step 6: Final answer
   x = 5,899.73