Finding the Fourth Proportional to 21,273.15, 31,909.71 and 5,690.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,273.15 : 31,909.71 = 5,690.37 : x
2. Step 2: Convert to fraction form
   21,273.15/31,909.71 = 5,690.37/x
3. Step 3: Cross multiply
   21,273.15x = 31,909.71 × 5,690.37
4. Step 4: Simplify right side
   21,273.15x = 181,578,056.49
5. Step 5: Solve for x
   x = 181,578,056.49/21,273.15
6. Step 6: Final answer
   x = 8,535.55