Finding the Fourth Proportional to 142,435.82, 196,553.43 and 77,892.21

Step by Step Solution

1. Step 1: Write the proportion equation
   142,435.82 : 196,553.43 = 77,892.21 : x
2. Step 2: Convert to fraction form
   142,435.82/196,553.43 = 77,892.21/x
3. Step 3: Cross multiply
   142,435.82x = 196,553.43 × 77,892.21
4. Step 4: Simplify right side
   142,435.82x = 15,309,981,045.78
5. Step 5: Solve for x
   x = 15,309,981,045.78/142,435.82
6. Step 6: Final answer
   x = 107,486.88