Finding the Fourth Proportional to 101,342.72, 139,850.88 and 55,401.68

Step by Step Solution

1. Step 1: Write the proportion equation
   101,342.72 : 139,850.88 = 55,401.68 : x
2. Step 2: Convert to fraction form
   101,342.72/139,850.88 = 55,401.68/x
3. Step 3: Cross multiply
   101,342.72x = 139,850.88 × 55,401.68
4. Step 4: Simplify right side
   101,342.72x = 7,747,973,701.48
5. Step 5: Solve for x
   x = 7,747,973,701.48/101,342.72
6. Step 6: Final answer
   x = 76,453.18