Finding the Fourth Proportional to 37,200.78, 55,789.28 and 12,235.10

Step by Step Solution

1. Step 1: Write the proportion equation
   37,200.78 : 55,789.28 = 12,235.10 : x
2. Step 2: Convert to fraction form
   37,200.78/55,789.28 = 12,235.10/x
3. Step 3: Cross multiply
   37,200.78x = 55,789.28 × 12,235.10
4. Step 4: Simplify right side
   37,200.78x = 682,587,419.73
5. Step 5: Solve for x
   x = 682,587,419.73/37,200.78
6. Step 6: Final answer
   x = 18,348.74