Finding the Fourth Proportional to 82,939.05, 124,488.77 and 78,443.55

Step by Step Solution

1. Step 1: Write the proportion equation
   82,939.05 : 124,488.77 = 78,443.55 : x
2. Step 2: Convert to fraction form
   82,939.05/124,488.77 = 78,443.55/x
3. Step 3: Cross multiply
   82,939.05x = 124,488.77 × 78,443.55
4. Step 4: Simplify right side
   82,939.05x = 9,765,340,661.72
5. Step 5: Solve for x
   x = 9,765,340,661.72/82,939.05
6. Step 6: Final answer
   x = 117,741.17