Finding the Fourth Proportional to 21,946.84, 32,920.22 and 7,908.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,946.84 : 32,920.22 = 7,908.72 : x
2. Step 2: Convert to fraction form
   21,946.84/32,920.22 = 7,908.72/x
3. Step 3: Cross multiply
   21,946.84x = 32,920.22 × 7,908.72
4. Step 4: Simplify right side
   21,946.84x = 260,356,802.32
5. Step 5: Solve for x
   x = 260,356,802.32/21,946.84
6. Step 6: Final answer
   x = 11,863.07