Finding the Fourth Proportional to 142,217.84, 196,256.86 and 78,554.27

Step by Step Solution

1. Step 1: Write the proportion equation
   142,217.84 : 196,256.86 = 78,554.27 : x
2. Step 2: Convert to fraction form
   142,217.84/196,256.86 = 78,554.27/x
3. Step 3: Cross multiply
   142,217.84x = 196,256.86 × 78,554.27
4. Step 4: Simplify right side
   142,217.84x = 15,416,814,369.79
5. Step 5: Solve for x
   x = 15,416,814,369.79/142,217.84
6. Step 6: Final answer
   x = 108,402.82