Finding the Fourth Proportional to 21,150.96, 29,154.78 and 16,667.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.96 : 29,154.78 = 16,667.88 : x
2. Step 2: Convert to fraction form
   21,150.96/29,154.78 = 16,667.88/x
3. Step 3: Cross multiply
   21,150.96x = 29,154.78 × 16,667.88
4. Step 4: Simplify right side
   21,150.96x = 485,948,374.47
5. Step 5: Solve for x
   x = 485,948,374.47/21,150.96
6. Step 6: Final answer
   x = 22,975.24