Finding the Fourth Proportional to 37,371.85, 56,045.59 and 12,405.20

Step by Step Solution

1. Step 1: Write the proportion equation
   37,371.85 : 56,045.59 = 12,405.20 : x
2. Step 2: Convert to fraction form
   37,371.85/56,045.59 = 12,405.20/x
3. Step 3: Cross multiply
   37,371.85x = 56,045.59 × 12,405.20
4. Step 4: Simplify right side
   37,371.85x = 695,256,441.83
5. Step 5: Solve for x
   x = 695,256,441.83/37,371.85
6. Step 6: Final answer
   x = 18,603.75