Finding the Fourth Proportional to 142,643.14, 196,849.95 and 78,111.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,643.14 : 196,849.95 = 78,111.34 : x
2. Step 2: Convert to fraction form
   142,643.14/196,849.95 = 78,111.34/x
3. Step 3: Cross multiply
   142,643.14x = 196,849.95 × 78,111.34
4. Step 4: Simplify right side
   142,643.14x = 15,376,213,373.43
5. Step 5: Solve for x
   x = 15,376,213,373.43/142,643.14
6. Step 6: Final answer
   x = 107,794.97