Finding the Fourth Proportional to 120,906.10, 169,443.50 and 120,906.10

Step by Step Solution

1. Step 1: Write the proportion equation
   120,906.10 : 169,443.50 = 120,906.10 : x
2. Step 2: Convert to fraction form
   120,906.10/169,443.50 = 120,906.10/x
3. Step 3: Cross multiply
   120,906.10x = 169,443.50 × 120,906.10
4. Step 4: Simplify right side
   120,906.10x = 20,486,752,755.35
5. Step 5: Solve for x
   x = 20,486,752,755.35/120,906.10
6. Step 6: Final answer
   x = 169,443.50