Finding the Fourth Proportional to 101,359, 139,879.74 and 56,647

Step by Step Solution

1. Step 1: Write the proportion equation
   101,359 : 139,879.74 = 56,647 : x
2. Step 2: Convert to fraction form
   101,359/139,879.74 = 56,647/x
3. Step 3: Cross multiply
   101,359x = 139,879.74 × 56,647
4. Step 4: Simplify right side
   101,359x = 7,923,767,631.78
5. Step 5: Solve for x
   x = 7,923,767,631.78/101,359
6. Step 6: Final answer
   x = 78,175.27