Finding the Fourth Proportional to 21,964.56, 32,938.56 and 7,920.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,964.56 : 32,938.56 = 7,920.84 : x
2. Step 2: Convert to fraction form
   21,964.56/32,938.56 = 7,920.84/x
3. Step 3: Cross multiply
   21,964.56x = 32,938.56 × 7,920.84
4. Step 4: Simplify right side
   21,964.56x = 260,901,063.59
5. Step 5: Solve for x
   x = 260,901,063.59/21,964.56
6. Step 6: Final answer
   x = 11,878.27