Finding the Fourth Proportional to 21,077.74, 31,632.17 and 9,984.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,077.74 : 31,632.17 = 9,984.42 : x
2. Step 2: Convert to fraction form
   21,077.74/31,632.17 = 9,984.42/x
3. Step 3: Cross multiply
   21,077.74x = 31,632.17 × 9,984.42
4. Step 4: Simplify right side
   21,077.74x = 315,828,870.79
5. Step 5: Solve for x
   x = 315,828,870.79/21,077.74
6. Step 6: Final answer
   x = 14,984.00