Finding the Fourth Proportional to 21,006.28, 31,513.86 and 17,567.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,006.28 : 31,513.86 = 17,567.56 : x
2. Step 2: Convert to fraction form
   21,006.28/31,513.86 = 17,567.56/x
3. Step 3: Cross multiply
   21,006.28x = 31,513.86 × 17,567.56
4. Step 4: Simplify right side
   21,006.28x = 553,621,626.38
5. Step 5: Solve for x
   x = 553,621,626.38/21,006.28
6. Step 6: Final answer
   x = 26,355.05