Finding the Fourth Proportional to 101,015.49, 139,400.78 and 55,693.29

Step by Step Solution

1. Step 1: Write the proportion equation
   101,015.49 : 139,400.78 = 55,693.29 : x
2. Step 2: Convert to fraction form
   101,015.49/139,400.78 = 55,693.29/x
3. Step 3: Cross multiply
   101,015.49x = 139,400.78 × 55,693.29
4. Step 4: Simplify right side
   101,015.49x = 7,763,687,788.30
5. Step 5: Solve for x
   x = 7,763,687,788.30/101,015.49
6. Step 6: Final answer
   x = 76,856.41