Finding the Fourth Proportional to 101,961.48, 140,729.32 and 56,655

Step by Step Solution

1. Step 1: Write the proportion equation
   101,961.48 : 140,729.32 = 56,655 : x
2. Step 2: Convert to fraction form
   101,961.48/140,729.32 = 56,655/x
3. Step 3: Cross multiply
   101,961.48x = 140,729.32 × 56,655
4. Step 4: Simplify right side
   101,961.48x = 7,973,019,624.60
5. Step 5: Solve for x
   x = 7,973,019,624.60/101,961.48
6. Step 6: Final answer
   x = 78,196.39