Finding the Fourth Proportional to 21,033.10, 31,548.94 and 5,238.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,033.10 : 31,548.94 = 5,238.10 : x
2. Step 2: Convert to fraction form
   21,033.10/31,548.94 = 5,238.10/x
3. Step 3: Cross multiply
   21,033.10x = 31,548.94 × 5,238.10
4. Step 4: Simplify right side
   21,033.10x = 165,256,502.61
5. Step 5: Solve for x
   x = 165,256,502.61/21,033.10
6. Step 6: Final answer
   x = 7,856.97