Finding the Fourth Proportional to 21,111.50, 31,662.52 and 6,318.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.50 : 31,662.52 = 6,318.54 : x
2. Step 2: Convert to fraction form
   21,111.50/31,662.52 = 6,318.54/x
3. Step 3: Cross multiply
   21,111.50x = 31,662.52 × 6,318.54
4. Step 4: Simplify right side
   21,111.50x = 200,060,883.32
5. Step 5: Solve for x
   x = 200,060,883.32/21,111.50
6. Step 6: Final answer
   x = 9,476.39