Finding the Fourth Proportional to 101,448, 139,998.72 and 56,736

Step by Step Solution

1. Step 1: Write the proportion equation
   101,448 : 139,998.72 = 56,736 : x
2. Step 2: Convert to fraction form
   101,448/139,998.72 = 56,736/x
3. Step 3: Cross multiply
   101,448x = 139,998.72 × 56,736
4. Step 4: Simplify right side
   101,448x = 7,942,967,377.92
5. Step 5: Solve for x
   x = 7,942,967,377.92/101,448
6. Step 6: Final answer
   x = 78,295.95