Finding the Fourth Proportional to 20,904.84, 31,354.56 and 5,321.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,904.84 : 31,354.56 = 5,321.52 : x
2. Step 2: Convert to fraction form
   20,904.84/31,354.56 = 5,321.52/x
3. Step 3: Cross multiply
   20,904.84x = 31,354.56 × 5,321.52
4. Step 4: Simplify right side
   20,904.84x = 166,853,918.13
5. Step 5: Solve for x
   x = 166,853,918.13/20,904.84
6. Step 6: Final answer
   x = 7,981.59