Finding the Fourth Proportional to 21,267.48, 31,898.78 and 5,686.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,267.48 : 31,898.78 = 5,686.32 : x
2. Step 2: Convert to fraction form
   21,267.48/31,898.78 = 5,686.32/x
3. Step 3: Cross multiply
   21,267.48x = 31,898.78 × 5,686.32
4. Step 4: Simplify right side
   21,267.48x = 181,386,635.76
5. Step 5: Solve for x
   x = 181,386,635.76/21,267.48
6. Step 6: Final answer
   x = 8,528.83