Finding the Fourth Proportional to 76,142.58, 105,076.89 and 42,608.58

Step by Step Solution

1. Step 1: Write the proportion equation
   76,142.58 : 105,076.89 = 42,608.58 : x
2. Step 2: Convert to fraction form
   76,142.58/105,076.89 = 42,608.58/x
3. Step 3: Cross multiply
   76,142.58x = 105,076.89 × 42,608.58
4. Step 4: Simplify right side
   76,142.58x = 4,477,177,073.72
5. Step 5: Solve for x
   x = 4,477,177,073.72/76,142.58
6. Step 6: Final answer
   x = 58,799.91