Finding the Fourth Proportional to 57,185.83, 78,908.96 and 31,690.97

Step by Step Solution

1. Step 1: Write the proportion equation
   57,185.83 : 78,908.96 = 31,690.97 : x
2. Step 2: Convert to fraction form
   57,185.83/78,908.96 = 31,690.97/x
3. Step 3: Cross multiply
   57,185.83x = 78,908.96 × 31,690.97
4. Step 4: Simplify right side
   57,185.83x = 2,500,701,168.77
5. Step 5: Solve for x
   x = 2,500,701,168.77/57,185.83
6. Step 6: Final answer
   x = 43,729.39