Finding the Fourth Proportional to 16,518.60, 22,790.52 and 10,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,518.60 : 22,790.52 = 10,138.50 : x
2. Step 2: Convert to fraction form
   16,518.60/22,790.52 = 10,138.50/x
3. Step 3: Cross multiply
   16,518.60x = 22,790.52 × 10,138.50
4. Step 4: Simplify right side
   16,518.60x = 231,061,687.02
5. Step 5: Solve for x
   x = 231,061,687.02/16,518.60
6. Step 6: Final answer
   x = 13,987.97