Finding the Fourth Proportional to 10,942.28, 16,388.94 and 5,090.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,942.28 : 16,388.94 = 5,090.12 : x
2. Step 2: Convert to fraction form
   10,942.28/16,388.94 = 5,090.12/x
3. Step 3: Cross multiply
   10,942.28x = 16,388.94 × 5,090.12
4. Step 4: Simplify right side
   10,942.28x = 83,421,671.27
5. Step 5: Solve for x
   x = 83,421,671.27/10,942.28
6. Step 6: Final answer
   x = 7,623.79