Finding the Fourth Proportional to 21,259.83, 31,866.42 and 8,773.41

Step by Step Solution

1. Step 1: Write the proportion equation
   21,259.83 : 31,866.42 = 8,773.41 : x
2. Step 2: Convert to fraction form
   21,259.83/31,866.42 = 8,773.41/x
3. Step 3: Cross multiply
   21,259.83x = 31,866.42 × 8,773.41
4. Step 4: Simplify right side
   21,259.83x = 279,577,167.89
5. Step 5: Solve for x
   x = 279,577,167.89/21,259.83
6. Step 6: Final answer
   x = 13,150.49