Finding the Fourth Proportional to 78,028.45, 116,993.46 and 42,992.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,028.45 : 116,993.46 = 42,992.71 : x
2. Step 2: Convert to fraction form
   78,028.45/116,993.46 = 42,992.71/x
3. Step 3: Cross multiply
   78,028.45x = 116,993.46 × 42,992.71
4. Step 4: Simplify right side
   78,028.45x = 5,029,865,766.42
5. Step 5: Solve for x
   x = 5,029,865,766.42/78,028.45
6. Step 6: Final answer
   x = 64,461.95