Finding the Fourth Proportional to 78,385.92, 117,498.33 and 30,981.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,385.92 : 117,498.33 = 30,981.75 : x
2. Step 2: Convert to fraction form
   78,385.92/117,498.33 = 30,981.75/x
3. Step 3: Cross multiply
   78,385.92x = 117,498.33 × 30,981.75
4. Step 4: Simplify right side
   78,385.92x = 3,640,303,885.48
5. Step 5: Solve for x
   x = 3,640,303,885.48/78,385.92
6. Step 6: Final answer
   x = 46,440.79