Finding the Fourth Proportional to 76,260.88, 105,239.82 and 42,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,260.88 : 105,239.82 = 42,269.50 : x
2. Step 2: Convert to fraction form
   76,260.88/105,239.82 = 42,269.50/x
3. Step 3: Cross multiply
   76,260.88x = 105,239.82 × 42,269.50
4. Step 4: Simplify right side
   76,260.88x = 4,448,434,571.49
5. Step 5: Solve for x
   x = 4,448,434,571.49/76,260.88
6. Step 6: Final answer
   x = 58,331.80