Finding the Fourth Proportional to 196,645.50, 271,371.06 and 107,221.50

Step by Step Solution

1. Step 1: Write the proportion equation
   196,645.50 : 271,371.06 = 107,221.50 : x
2. Step 2: Convert to fraction form
   196,645.50/271,371.06 = 107,221.50/x
3. Step 3: Cross multiply
   196,645.50x = 271,371.06 × 107,221.50
4. Step 4: Simplify right side
   196,645.50x = 29,096,812,109.79
5. Step 5: Solve for x
   x = 29,096,812,109.79/196,645.50
6. Step 6: Final answer
   x = 147,965.82