Finding the Fourth Proportional to 21,228.32, 31,842.38 and 5,645.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,228.32 : 31,842.38 = 5,645.94 : x
2. Step 2: Convert to fraction form
   21,228.32/31,842.38 = 5,645.94/x
3. Step 3: Cross multiply
   21,228.32x = 31,842.38 × 5,645.94
4. Step 4: Simplify right side
   21,228.32x = 179,780,166.94
5. Step 5: Solve for x
   x = 179,780,166.94/21,228.32
6. Step 6: Final answer
   x = 8,468.88