Finding the Fourth Proportional to 76,228.28, 105,200.13 and 42,238.25

Step by Step Solution

1. Step 1: Write the proportion equation
   76,228.28 : 105,200.13 = 42,238.25 : x
2. Step 2: Convert to fraction form
   76,228.28/105,200.13 = 42,238.25/x
3. Step 3: Cross multiply
   76,228.28x = 105,200.13 × 42,238.25
4. Step 4: Simplify right side
   76,228.28x = 4,443,469,390.97
5. Step 5: Solve for x
   x = 4,443,469,390.97/76,228.28
6. Step 6: Final answer
   x = 58,291.61