Finding the Fourth Proportional to 21,976.80, 30,316.32 and 16,662.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.80 : 30,316.32 = 16,662.84 : x
2. Step 2: Convert to fraction form
   21,976.80/30,316.32 = 16,662.84/x
3. Step 3: Cross multiply
   21,976.80x = 30,316.32 × 16,662.84
4. Step 4: Simplify right side
   21,976.80x = 505,155,989.55
5. Step 5: Solve for x
   x = 505,155,989.55/21,976.80
6. Step 6: Final answer
   x = 22,985.88