Finding the Fourth Proportional to 14,407.72, 19,886.42 and 9,385.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,407.72 : 19,886.42 = 9,385.72 : x
2. Step 2: Convert to fraction form
   14,407.72/19,886.42 = 9,385.72/x
3. Step 3: Cross multiply
   14,407.72x = 19,886.42 × 9,385.72
4. Step 4: Simplify right side
   14,407.72x = 186,648,369.92
5. Step 5: Solve for x
   x = 186,648,369.92/14,407.72
6. Step 6: Final answer
   x = 12,954.75