Finding the Fourth Proportional to 76,076.42, 104,983.56 and 42,086.79

Step by Step Solution

1. Step 1: Write the proportion equation
   76,076.42 : 104,983.56 = 42,086.79 : x
2. Step 2: Convert to fraction form
   76,076.42/104,983.56 = 42,086.79/x
3. Step 3: Cross multiply
   76,076.42x = 104,983.56 × 42,086.79
4. Step 4: Simplify right side
   76,076.42x = 4,418,421,043.17
5. Step 5: Solve for x
   x = 4,418,421,043.17/76,076.42
6. Step 6: Final answer
   x = 58,078.72