Finding the Fourth Proportional to 142,290.53, 196,361.00 and 78,628.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,290.53 : 196,361.00 = 78,628.32 : x
2. Step 2: Convert to fraction form
   142,290.53/196,361.00 = 78,628.32/x
3. Step 3: Cross multiply
   142,290.53x = 196,361.00 × 78,628.32
4. Step 4: Simplify right side
   142,290.53x = 15,439,535,776.36
5. Step 5: Solve for x
   x = 15,439,535,776.36/142,290.53
6. Step 6: Final answer
   x = 108,507.12