Finding the Fourth Proportional to 16,221.38, 24,292.88 and 7,880.81

Step by Step Solution

1. Step 1: Write the proportion equation
   16,221.38 : 24,292.88 = 7,880.81 : x
2. Step 2: Convert to fraction form
   16,221.38/24,292.88 = 7,880.81/x
3. Step 3: Cross multiply
   16,221.38x = 24,292.88 × 7,880.81
4. Step 4: Simplify right side
   16,221.38x = 191,447,410.76
5. Step 5: Solve for x
   x = 191,447,410.76/16,221.38
6. Step 6: Final answer
   x = 11,802.17