Finding the Fourth Proportional to 39,386.05, 59,042.62 and 13,086.16

Step by Step Solution

1. Step 1: Write the proportion equation
   39,386.05 : 59,042.62 = 13,086.16 : x
2. Step 2: Convert to fraction form
   39,386.05/59,042.62 = 13,086.16/x
3. Step 3: Cross multiply
   39,386.05x = 59,042.62 × 13,086.16
4. Step 4: Simplify right side
   39,386.05x = 772,641,040.89
5. Step 5: Solve for x
   x = 772,641,040.89/39,386.05
6. Step 6: Final answer
   x = 19,617.13