Finding the Fourth Proportional to 78,498.43, 117,714.84 and 31,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,498.43 : 117,714.84 = 31,718.50 : x
2. Step 2: Convert to fraction form
   78,498.43/117,714.84 = 31,718.50/x
3. Step 3: Cross multiply
   78,498.43x = 117,714.84 × 31,718.50
4. Step 4: Simplify right side
   78,498.43x = 3,733,738,152.54
5. Step 5: Solve for x
   x = 3,733,738,152.54/78,498.43
6. Step 6: Final answer
   x = 47,564.49