Finding the Fourth Proportional to 37,655.39, 56,443.67 and 12,686.81

Step by Step Solution

1. Step 1: Write the proportion equation
   37,655.39 : 56,443.67 = 12,686.81 : x
2. Step 2: Convert to fraction form
   37,655.39/56,443.67 = 12,686.81/x
3. Step 3: Cross multiply
   37,655.39x = 56,443.67 × 12,686.81
4. Step 4: Simplify right side
   37,655.39x = 716,090,116.99
5. Step 5: Solve for x
   x = 716,090,116.99/37,655.39
6. Step 6: Final answer
   x = 19,016.94