Finding the Fourth Proportional to 78,517.74, 117,779.31 and 31,141.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,517.74 : 117,779.31 = 31,141.83 : x
2. Step 2: Convert to fraction form
   78,517.74/117,779.31 = 31,141.83/x
3. Step 3: Cross multiply
   78,517.74x = 117,779.31 × 31,141.83
4. Step 4: Simplify right side
   78,517.74x = 3,667,863,249.54
5. Step 5: Solve for x
   x = 3,667,863,249.54/78,517.74
6. Step 6: Final answer
   x = 46,713.82