Finding the Fourth Proportional to 15,819.98, 23,773.08 and 8,429.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,819.98 : 23,773.08 = 8,429.72 : x
2. Step 2: Convert to fraction form
   15,819.98/23,773.08 = 8,429.72/x
3. Step 3: Cross multiply
   15,819.98x = 23,773.08 × 8,429.72
4. Step 4: Simplify right side
   15,819.98x = 200,400,407.94
5. Step 5: Solve for x
   x = 200,400,407.94/15,819.98
6. Step 6: Final answer
   x = 12,667.55