Finding the Fourth Proportional to 49,152.10, 73,728.20 and 12,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   49,152.10 : 73,728.20 = 12,216.10 : x
2. Step 2: Convert to fraction form
   49,152.10/73,728.20 = 12,216.10/x
3. Step 3: Cross multiply
   49,152.10x = 73,728.20 × 12,216.10
4. Step 4: Simplify right side
   49,152.10x = 900,671,064.02
5. Step 5: Solve for x
   x = 900,671,064.02/49,152.10
6. Step 6: Final answer
   x = 18,324.16