Finding the Fourth Proportional to 21,958.60, 32,941.99 and 7,171.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,958.60 : 32,941.99 = 7,171.72 : x
2. Step 2: Convert to fraction form
   21,958.60/32,941.99 = 7,171.72/x
3. Step 3: Cross multiply
   21,958.60x = 32,941.99 × 7,171.72
4. Step 4: Simplify right side
   21,958.60x = 236,250,728.52
5. Step 5: Solve for x
   x = 236,250,728.52/21,958.60
6. Step 6: Final answer
   x = 10,758.92