Finding the Fourth Proportional to 37,886.56, 56,790.20 and 12,917.86

Step by Step Solution

1. Step 1: Write the proportion equation
   37,886.56 : 56,790.20 = 12,917.86 : x
2. Step 2: Convert to fraction form
   37,886.56/56,790.20 = 12,917.86/x
3. Step 3: Cross multiply
   37,886.56x = 56,790.20 × 12,917.86
4. Step 4: Simplify right side
   37,886.56x = 733,607,743.29
5. Step 5: Solve for x
   x = 733,607,743.29/37,886.56
6. Step 6: Final answer
   x = 19,363.27