Finding the Fourth Proportional to 76,078.83, 104,986.89 and 42,089.21

Step by Step Solution

1. Step 1: Write the proportion equation
   76,078.83 : 104,986.89 = 42,089.21 : x
2. Step 2: Convert to fraction form
   76,078.83/104,986.89 = 42,089.21/x
3. Step 3: Cross multiply
   76,078.83x = 104,986.89 × 42,089.21
4. Step 4: Simplify right side
   76,078.83x = 4,418,815,260.46
5. Step 5: Solve for x
   x = 4,418,815,260.46/76,078.83
6. Step 6: Final answer
   x = 58,082.06