Finding the Fourth Proportional to 99,511.38, 149,325.39 and 71,401.14

Step by Step Solution

1. Step 1: Write the proportion equation
   99,511.38 : 149,325.39 = 71,401.14 : x
2. Step 2: Convert to fraction form
   99,511.38/149,325.39 = 71,401.14/x
3. Step 3: Cross multiply
   99,511.38x = 149,325.39 × 71,401.14
4. Step 4: Simplify right side
   99,511.38x = 10,662,003,076.94
5. Step 5: Solve for x
   x = 10,662,003,076.94/99,511.38
6. Step 6: Final answer
   x = 107,143.56