Finding the Fourth Proportional to 142,667.19, 196,864.83 and 78,989.04

Step by Step Solution

1. Step 1: Write the proportion equation
   142,667.19 : 196,864.83 = 78,989.04 : x
2. Step 2: Convert to fraction form
   142,667.19/196,864.83 = 78,989.04/x
3. Step 3: Cross multiply
   142,667.19x = 196,864.83 × 78,989.04
4. Step 4: Simplify right side
   142,667.19x = 15,550,163,931.46
5. Step 5: Solve for x
   x = 15,550,163,931.46/142,667.19
6. Step 6: Final answer
   x = 108,996.08