Finding the Fourth Proportional to 206,238.90, 309,315.15 and 101,133.30

Step by Step Solution

1. Step 1: Write the proportion equation
   206,238.90 : 309,315.15 = 101,133.30 : x
2. Step 2: Convert to fraction form
   206,238.90/309,315.15 = 101,133.30/x
3. Step 3: Cross multiply
   206,238.90x = 309,315.15 × 101,133.30
4. Step 4: Simplify right side
   206,238.90x = 31,282,061,859.50
5. Step 5: Solve for x
   x = 31,282,061,859.50/206,238.90
6. Step 6: Final answer
   x = 151,678.77