Finding the Fourth Proportional to 78,730.61, 118,143.70 and 31,982.27

Step by Step Solution

1. Step 1: Write the proportion equation
   78,730.61 : 118,143.70 = 31,982.27 : x
2. Step 2: Convert to fraction form
   78,730.61/118,143.70 = 31,982.27/x
3. Step 3: Cross multiply
   78,730.61x = 118,143.70 × 31,982.27
4. Step 4: Simplify right side
   78,730.61x = 3,778,503,041.52
5. Step 5: Solve for x
   x = 3,778,503,041.52/78,730.61
6. Step 6: Final answer
   x = 47,992.81