Finding the Fourth Proportional to 142,372.69, 196,478.41 and 78,714.59

Step by Step Solution

1. Step 1: Write the proportion equation
   142,372.69 : 196,478.41 = 78,714.59 : x
2. Step 2: Convert to fraction form
   142,372.69/196,478.41 = 78,714.59/x
3. Step 3: Cross multiply
   142,372.69x = 196,478.41 × 78,714.59
4. Step 4: Simplify right side
   142,372.69x = 15,465,716,455.41
5. Step 5: Solve for x
   x = 15,465,716,455.41/142,372.69
6. Step 6: Final answer
   x = 108,628.39