Finding the Fourth Proportional to 76,238.20, 105,209.33 and 42,247.25

Step by Step Solution

1. Step 1: Write the proportion equation
   76,238.20 : 105,209.33 = 42,247.25 : x
2. Step 2: Convert to fraction form
   76,238.20/105,209.33 = 42,247.25/x
3. Step 3: Cross multiply
   76,238.20x = 105,209.33 × 42,247.25
4. Step 4: Simplify right side
   76,238.20x = 4,444,805,353.54
5. Step 5: Solve for x
   x = 4,444,805,353.54/76,238.20
6. Step 6: Final answer
   x = 58,301.55