Finding the Fourth Proportional to 78,087.49, 107,760.60 and 42,277.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,087.49 : 107,760.60 = 42,277.50 : x
2. Step 2: Convert to fraction form
   78,087.49/107,760.60 = 42,277.50/x
3. Step 3: Cross multiply
   78,087.49x = 107,760.60 × 42,277.50
4. Step 4: Simplify right side
   78,087.49x = 4,555,848,766.50
5. Step 5: Solve for x
   x = 4,555,848,766.50/78,087.49
6. Step 6: Final answer
   x = 58,342.88