Finding the Fourth Proportional to 85,394.72, 117,829.17 and 59,978.73

Step by Step Solution

1. Step 1: Write the proportion equation
   85,394.72 : 117,829.17 = 59,978.73 : x
2. Step 2: Convert to fraction form
   85,394.72/117,829.17 = 59,978.73/x
3. Step 3: Cross multiply
   85,394.72x = 117,829.17 × 59,978.73
4. Step 4: Simplify right side
   85,394.72x = 7,067,243,973.55
5. Step 5: Solve for x
   x = 7,067,243,973.55/85,394.72
6. Step 6: Final answer
   x = 82,759.73