Finding the Fourth Proportional to 7,018.31, 10,542.83 and 5,181.23

Step by Step Solution

1. Step 1: Write the proportion equation
   7,018.31 : 10,542.83 = 5,181.23 : x
2. Step 2: Convert to fraction form
   7,018.31/10,542.83 = 5,181.23/x
3. Step 3: Cross multiply
   7,018.31x = 10,542.83 × 5,181.23
4. Step 4: Simplify right side
   7,018.31x = 54,624,827.53
5. Step 5: Solve for x
   x = 54,624,827.53/7,018.31
6. Step 6: Final answer
   x = 7,783.19