Finding the Fourth Proportional to 4,942.31, 7,378.20 and 4,769.30

Step by Step Solution

1. Step 1: Write the proportion equation
   4,942.31 : 7,378.20 = 4,769.30 : x
2. Step 2: Convert to fraction form
   4,942.31/7,378.20 = 4,769.30/x
3. Step 3: Cross multiply
   4,942.31x = 7,378.20 × 4,769.30
4. Step 4: Simplify right side
   4,942.31x = 35,188,812.37
5. Step 5: Solve for x
   x = 35,188,812.37/4,942.31
6. Step 6: Final answer
   x = 7,119.92