Finding the Fourth Proportional to 101,338.72, 139,847.10 and 56,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,338.72 : 139,847.10 = 56,626.72 : x
2. Step 2: Convert to fraction form
   101,338.72/139,847.10 = 56,626.72/x
3. Step 3: Cross multiply
   101,338.72x = 139,847.10 × 56,626.72
4. Step 4: Simplify right side
   101,338.72x = 7,919,082,574.51
5. Step 5: Solve for x
   x = 7,919,082,574.51/101,338.72
6. Step 6: Final answer
   x = 78,144.69