Finding the Fourth Proportional to 21,253.40, 31,887.98 and 8,774.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,253.40 : 31,887.98 = 8,774.52 : x
2. Step 2: Convert to fraction form
   21,253.40/31,887.98 = 8,774.52/x
3. Step 3: Cross multiply
   21,253.40x = 31,887.98 × 8,774.52
4. Step 4: Simplify right side
   21,253.40x = 279,801,718.27
5. Step 5: Solve for x
   x = 279,801,718.27/21,253.40
6. Step 6: Final answer
   x = 13,165.03