Finding the Fourth Proportional to 37,389.43, 56,072.02 and 12,422.78

Step by Step Solution

1. Step 1: Write the proportion equation
   37,389.43 : 56,072.02 = 12,422.78 : x
2. Step 2: Convert to fraction form
   37,389.43/56,072.02 = 12,422.78/x
3. Step 3: Cross multiply
   37,389.43x = 56,072.02 × 12,422.78
4. Step 4: Simplify right side
   37,389.43x = 696,570,290.76
5. Step 5: Solve for x
   x = 696,570,290.76/37,389.43
6. Step 6: Final answer
   x = 18,630.14