Finding the Fourth Proportional to 5,092.78, 7,642.03 and 3,979.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,092.78 : 7,642.03 = 3,979.07 : x
2. Step 2: Convert to fraction form
   5,092.78/7,642.03 = 3,979.07/x
3. Step 3: Cross multiply
   5,092.78x = 7,642.03 × 3,979.07
4. Step 4: Simplify right side
   5,092.78x = 30,408,172.31
5. Step 5: Solve for x
   x = 30,408,172.31/5,092.78
6. Step 6: Final answer
   x = 5,970.84