Finding the Fourth Proportional to 79,071.78, 118,632.06 and 31,686.78

Step by Step Solution

1. Step 1: Write the proportion equation
   79,071.78 : 118,632.06 = 31,686.78 : x
2. Step 2: Convert to fraction form
   79,071.78/118,632.06 = 31,686.78/x
3. Step 3: Cross multiply
   79,071.78x = 118,632.06 × 31,686.78
4. Step 4: Simplify right side
   79,071.78x = 3,759,067,986.17
5. Step 5: Solve for x
   x = 3,759,067,986.17/79,071.78
6. Step 6: Final answer
   x = 47,539.94