Finding the Fourth Proportional to 12,250.54, 18,374.78 and 3,928.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,250.54 : 18,374.78 = 3,928.30 : x
2. Step 2: Convert to fraction form
   12,250.54/18,374.78 = 3,928.30/x
3. Step 3: Cross multiply
   12,250.54x = 18,374.78 × 3,928.30
4. Step 4: Simplify right side
   12,250.54x = 72,181,612.16
5. Step 5: Solve for x
   x = 72,181,612.16/12,250.54
6. Step 6: Final answer
   x = 5,892.12