Finding the Fourth Proportional to 37,018.76, 55,516.62 and 12,389

Step by Step Solution

1. Step 1: Write the proportion equation
   37,018.76 : 55,516.62 = 12,389 : x
2. Step 2: Convert to fraction form
   37,018.76/55,516.62 = 12,389/x
3. Step 3: Cross multiply
   37,018.76x = 55,516.62 × 12,389
4. Step 4: Simplify right side
   37,018.76x = 687,795,405.18
5. Step 5: Solve for x
   x = 687,795,405.18/37,018.76
6. Step 6: Final answer
   x = 18,579.64