Finding the Fourth Proportional to 37,578.58, 56,370.72 and 12,618.76

Step by Step Solution

1. Step 1: Write the proportion equation
   37,578.58 : 56,370.72 = 12,618.76 : x
2. Step 2: Convert to fraction form
   37,578.58/56,370.72 = 12,618.76/x
3. Step 3: Cross multiply
   37,578.58x = 56,370.72 × 12,618.76
4. Step 4: Simplify right side
   37,578.58x = 711,328,586.71
5. Step 5: Solve for x
   x = 711,328,586.71/37,578.58
6. Step 6: Final answer
   x = 18,929.10