Finding the Fourth Proportional to 142,527.12, 196,667.28 and 78,864.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,527.12 : 196,667.28 = 78,864.72 : x
2. Step 2: Convert to fraction form
   142,527.12/196,667.28 = 78,864.72/x
3. Step 3: Cross multiply
   142,527.12x = 196,667.28 × 78,864.72
4. Step 4: Simplify right side
   142,527.12x = 15,510,109,970.36
5. Step 5: Solve for x
   x = 15,510,109,970.36/142,527.12
6. Step 6: Final answer
   x = 108,822.17