Finding the Fourth Proportional to 79,108.86, 118,664.50 and 31,728.13

Step by Step Solution

1. Step 1: Write the proportion equation
   79,108.86 : 118,664.50 = 31,728.13 : x
2. Step 2: Convert to fraction form
   79,108.86/118,664.50 = 31,728.13/x
3. Step 3: Cross multiply
   79,108.86x = 118,664.50 × 31,728.13
4. Step 4: Simplify right side
   79,108.86x = 3,765,002,682.39
5. Step 5: Solve for x
   x = 3,765,002,682.39/79,108.86
6. Step 6: Final answer
   x = 47,592.68