Finding the Fourth Proportional to 39,141.83, 58,710.70 and 13,839.61

Step by Step Solution

1. Step 1: Write the proportion equation
   39,141.83 : 58,710.70 = 13,839.61 : x
2. Step 2: Convert to fraction form
   39,141.83/58,710.70 = 13,839.61/x
3. Step 3: Cross multiply
   39,141.83x = 58,710.70 × 13,839.61
4. Step 4: Simplify right side
   39,141.83x = 812,533,132.51
5. Step 5: Solve for x
   x = 812,533,132.51/39,141.83
6. Step 6: Final answer
   x = 20,758.69