Finding the Fourth Proportional to 37,657.27, 56,446.48 and 12,688.69

Step by Step Solution

1. Step 1: Write the proportion equation
   37,657.27 : 56,446.48 = 12,688.69 : x
2. Step 2: Convert to fraction form
   37,657.27/56,446.48 = 12,688.69/x
3. Step 3: Cross multiply
   37,657.27x = 56,446.48 × 12,688.69
4. Step 4: Simplify right side
   37,657.27x = 716,231,886.31
5. Step 5: Solve for x
   x = 716,231,886.31/37,657.27
6. Step 6: Final answer
   x = 19,019.75