Finding the Fourth Proportional to 101,017.72, 139,376.46 and 57,997

Step by Step Solution

1. Step 1: Write the proportion equation
   101,017.72 : 139,376.46 = 57,997 : x
2. Step 2: Convert to fraction form
   101,017.72/139,376.46 = 57,997/x
3. Step 3: Cross multiply
   101,017.72x = 139,376.46 × 57,997
4. Step 4: Simplify right side
   101,017.72x = 8,083,416,550.62
5. Step 5: Solve for x
   x = 8,083,416,550.62/101,017.72
6. Step 6: Final answer
   x = 80,019.79