Finding the Fourth Proportional to 206,196.72, 309,414.12 and 111,427.20

Step by Step Solution

1. Step 1: Write the proportion equation
   206,196.72 : 309,414.12 = 111,427.20 : x
2. Step 2: Convert to fraction form
   206,196.72/309,414.12 = 111,427.20/x
3. Step 3: Cross multiply
   206,196.72x = 309,414.12 × 111,427.20
4. Step 4: Simplify right side
   206,196.72x = 34,477,149,032.06
5. Step 5: Solve for x
   x = 34,477,149,032.06/206,196.72
6. Step 6: Final answer
   x = 167,205.13