Finding the Fourth Proportional to 21,991.07, 32,979.74 and 7,196.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,991.07 : 32,979.74 = 7,196.69 : x
2. Step 2: Convert to fraction form
   21,991.07/32,979.74 = 7,196.69/x
3. Step 3: Cross multiply
   21,991.07x = 32,979.74 × 7,196.69
4. Step 4: Simplify right side
   21,991.07x = 237,344,800.16
5. Step 5: Solve for x
   x = 237,344,800.16/21,991.07
6. Step 6: Final answer
   x = 10,792.78