Finding the Fourth Proportional to 21,940.58, 32,914.28 and 7,146.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,940.58 : 32,914.28 = 7,146.05 : x
2. Step 2: Convert to fraction form
   21,940.58/32,914.28 = 7,146.05/x
3. Step 3: Cross multiply
   21,940.58x = 32,914.28 × 7,146.05
4. Step 4: Simplify right side
   21,940.58x = 235,207,054.86
5. Step 5: Solve for x
   x = 235,207,054.86/21,940.58
6. Step 6: Final answer
   x = 10,720.19