Finding the Fourth Proportional to 67,780.70, 93,540.81 and 39,089.69

Step by Step Solution

1. Step 1: Write the proportion equation
   67,780.70 : 93,540.81 = 39,089.69 : x
2. Step 2: Convert to fraction form
   67,780.70/93,540.81 = 39,089.69/x
3. Step 3: Cross multiply
   67,780.70x = 93,540.81 × 39,089.69
4. Step 4: Simplify right side
   67,780.70x = 3,656,481,499.10
5. Step 5: Solve for x
   x = 3,656,481,499.10/67,780.70
6. Step 6: Final answer
   x = 53,945.76