Finding the Fourth Proportional to 16,621.32, 25,015.62 and 12,483

Step by Step Solution

1. Step 1: Write the proportion equation
   16,621.32 : 25,015.62 = 12,483 : x
2. Step 2: Convert to fraction form
   16,621.32/25,015.62 = 12,483/x
3. Step 3: Cross multiply
   16,621.32x = 25,015.62 × 12,483
4. Step 4: Simplify right side
   16,621.32x = 312,269,984.46
5. Step 5: Solve for x
   x = 312,269,984.46/16,621.32
6. Step 6: Final answer
   x = 18,787.32