Finding the Fourth Proportional to 14,483.77, 21,688.89 and 12,137.61

Step by Step Solution

1. Step 1: Write the proportion equation
   14,483.77 : 21,688.89 = 12,137.61 : x
2. Step 2: Convert to fraction form
   14,483.77/21,688.89 = 12,137.61/x
3. Step 3: Cross multiply
   14,483.77x = 21,688.89 × 12,137.61
4. Step 4: Simplify right side
   14,483.77x = 263,251,288.15
5. Step 5: Solve for x
   x = 263,251,288.15/14,483.77
6. Step 6: Final answer
   x = 18,175.61