Finding the Fourth Proportional to 142,288.02, 196,361.40 and 78,629.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,288.02 : 196,361.40 = 78,629.82 : x
2. Step 2: Convert to fraction form
   142,288.02/196,361.40 = 78,629.82/x
3. Step 3: Cross multiply
   142,288.02x = 196,361.40 × 78,629.82
4. Step 4: Simplify right side
   142,288.02x = 15,439,861,536.95
5. Step 5: Solve for x
   x = 15,439,861,536.95/142,288.02
6. Step 6: Final answer
   x = 108,511.32