Finding the Fourth Proportional to 37,018.26, 55,533.15 and 12,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   37,018.26 : 55,533.15 = 12,388.50 : x
2. Step 2: Convert to fraction form
   37,018.26/55,533.15 = 12,388.50/x
3. Step 3: Cross multiply
   37,018.26x = 55,533.15 × 12,388.50
4. Step 4: Simplify right side
   37,018.26x = 687,972,428.78
5. Step 5: Solve for x
   x = 687,972,428.78/37,018.26
6. Step 6: Final answer
   x = 18,584.68