Finding the Fourth Proportional to 15,838.35, 21,875.55 and 12,662.67

Step by Step Solution

1. Step 1: Write the proportion equation
   15,838.35 : 21,875.55 = 12,662.67 : x
2. Step 2: Convert to fraction form
   15,838.35/21,875.55 = 12,662.67/x
3. Step 3: Cross multiply
   15,838.35x = 21,875.55 × 12,662.67
4. Step 4: Simplify right side
   15,838.35x = 277,002,870.72
5. Step 5: Solve for x
   x = 277,002,870.72/15,838.35
6. Step 6: Final answer
   x = 17,489.38