Finding the Fourth Proportional to 78,087.48, 107,760.57 and 42,277.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,087.48 : 107,760.57 = 42,277.49 : x
2. Step 2: Convert to fraction form
   78,087.48/107,760.57 = 42,277.49/x
3. Step 3: Cross multiply
   78,087.48x = 107,760.57 × 42,277.49
4. Step 4: Simplify right side
   78,087.48x = 4,555,845,881.77
5. Step 5: Solve for x
   x = 4,555,845,881.77/78,087.48
6. Step 6: Final answer
   x = 58,342.85