Finding the Fourth Proportional to 142,306.17, 196,370.73 and 78,643.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,306.17 : 196,370.73 = 78,643.82 : x
2. Step 2: Convert to fraction form
   142,306.17/196,370.73 = 78,643.82/x
3. Step 3: Cross multiply
   142,306.17x = 196,370.73 × 78,643.82
4. Step 4: Simplify right side
   142,306.17x = 15,443,343,361.54
5. Step 5: Solve for x
   x = 15,443,343,361.54/142,306.17
6. Step 6: Final answer
   x = 108,521.95