Finding the Fourth Proportional to 78,654.87, 117,916.99 and 31,240.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,654.87 : 117,916.99 = 31,240.71 : x
2. Step 2: Convert to fraction form
   78,654.87/117,916.99 = 31,240.71/x
3. Step 3: Cross multiply
   78,654.87x = 117,916.99 × 31,240.71
4. Step 4: Simplify right side
   78,654.87x = 3,683,810,410.56
5. Step 5: Solve for x
   x = 3,683,810,410.56/78,654.87
6. Step 6: Final answer
   x = 46,835.12