Finding the Fourth Proportional to 21,925.76, 32,892.07 and 7,131.21

Step by Step Solution

1. Step 1: Write the proportion equation
   21,925.76 : 32,892.07 = 7,131.21 : x
2. Step 2: Convert to fraction form
   21,925.76/32,892.07 = 7,131.21/x
3. Step 3: Cross multiply
   21,925.76x = 32,892.07 × 7,131.21
4. Step 4: Simplify right side
   21,925.76x = 234,560,185.19
5. Step 5: Solve for x
   x = 234,560,185.19/21,925.76
6. Step 6: Final answer
   x = 10,697.93