Finding the Fourth Proportional to 39,016.56, 58,513.72 and 12,723.60

Step by Step Solution

1. Step 1: Write the proportion equation
   39,016.56 : 58,513.72 = 12,723.60 : x
2. Step 2: Convert to fraction form
   39,016.56/58,513.72 = 12,723.60/x
3. Step 3: Cross multiply
   39,016.56x = 58,513.72 × 12,723.60
4. Step 4: Simplify right side
   39,016.56x = 744,505,167.79
5. Step 5: Solve for x
   x = 744,505,167.79/39,016.56
6. Step 6: Final answer
   x = 19,081.77