Finding the Fourth Proportional to 78,087.02, 107,760.15 and 42,277.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,087.02 : 107,760.15 = 42,277.05 : x
2. Step 2: Convert to fraction form
   78,087.02/107,760.15 = 42,277.05/x
3. Step 3: Cross multiply
   78,087.02x = 107,760.15 × 42,277.05
4. Step 4: Simplify right side
   78,087.02x = 4,555,781,249.56
5. Step 5: Solve for x
   x = 4,555,781,249.56/78,087.02
6. Step 6: Final answer
   x = 58,342.37