Finding the Fourth Proportional to 21,069.18, 31,601.16 and 5,488.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,069.18 : 31,601.16 = 5,488.02 : x
2. Step 2: Convert to fraction form
   21,069.18/31,601.16 = 5,488.02/x
3. Step 3: Cross multiply
   21,069.18x = 31,601.16 × 5,488.02
4. Step 4: Simplify right side
   21,069.18x = 173,427,798.10
5. Step 5: Solve for x
   x = 173,427,798.10/21,069.18
6. Step 6: Final answer
   x = 8,231.35