Finding the Fourth Proportional to 142,632.69, 196,846.31 and 78,970.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,632.69 : 196,846.31 = 78,970.49 : x
2. Step 2: Convert to fraction form
   142,632.69/196,846.31 = 78,970.49/x
3. Step 3: Cross multiply
   142,632.69x = 196,846.31 × 78,970.49
4. Step 4: Simplify right side
   142,632.69x = 15,545,049,506.76
5. Step 5: Solve for x
   x = 15,545,049,506.76/142,632.69
6. Step 6: Final answer
   x = 108,986.59