Finding the Fourth Proportional to 12,100.12, 18,150.98 and 3,215.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,100.12 : 18,150.98 = 3,215.32 : x
2. Step 2: Convert to fraction form
   12,100.12/18,150.98 = 3,215.32/x
3. Step 3: Cross multiply
   12,100.12x = 18,150.98 × 3,215.32
4. Step 4: Simplify right side
   12,100.12x = 58,361,209.01
5. Step 5: Solve for x
   x = 58,361,209.01/12,100.12
6. Step 6: Final answer
   x = 4,823.19