Finding the Fourth Proportional to 21,401.52, 31,960.06 and 21,169.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.52 : 31,960.06 = 21,169.84 : x
2. Step 2: Convert to fraction form
   21,401.52/31,960.06 = 21,169.84/x
3. Step 3: Cross multiply
   21,401.52x = 31,960.06 × 21,169.84
4. Step 4: Simplify right side
   21,401.52x = 676,589,356.59
5. Step 5: Solve for x
   x = 676,589,356.59/21,401.52
6. Step 6: Final answer
   x = 31,614.08