Finding the Fourth Proportional to 18,499.87, 25,529.47 and 12,201.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,499.87 : 25,529.47 = 12,201.31 : x
2. Step 2: Convert to fraction form
   18,499.87/25,529.47 = 12,201.31/x
3. Step 3: Cross multiply
   18,499.87x = 25,529.47 × 12,201.31
4. Step 4: Simplify right side
   18,499.87x = 311,492,977.61
5. Step 5: Solve for x
   x = 311,492,977.61/18,499.87
6. Step 6: Final answer
   x = 16,837.58