Finding the Fourth Proportional to 78,485.67, 117,662.15 and 34,078.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.67 : 117,662.15 = 34,078.83 : x
2. Step 2: Convert to fraction form
   78,485.67/117,662.15 = 34,078.83/x
3. Step 3: Cross multiply
   78,485.67x = 117,662.15 × 34,078.83
4. Step 4: Simplify right side
   78,485.67x = 4,009,788,236.89
5. Step 5: Solve for x
   x = 4,009,788,236.89/78,485.67
6. Step 6: Final answer
   x = 51,089.43