Finding the Fourth Proportional to 78,740.71, 118,106.20 and 31,992.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,740.71 : 118,106.20 = 31,992.37 : x
2. Step 2: Convert to fraction form
   78,740.71/118,106.20 = 31,992.37/x
3. Step 3: Cross multiply
   78,740.71x = 118,106.20 × 31,992.37
4. Step 4: Simplify right side
   78,740.71x = 3,778,496,994.42
5. Step 5: Solve for x
   x = 3,778,496,994.42/78,740.71
6. Step 6: Final answer
   x = 47,986.58