Finding the Fourth Proportional to 142,628.48, 196,834.56 and 78,973.28

Step by Step Solution

1. Step 1: Write the proportion equation
   142,628.48 : 196,834.56 = 78,973.28 : x
2. Step 2: Convert to fraction form
   142,628.48/196,834.56 = 78,973.28/x
3. Step 3: Cross multiply
   142,628.48x = 196,834.56 × 78,973.28
4. Step 4: Simplify right side
   142,628.48x = 15,544,670,820.56
5. Step 5: Solve for x
   x = 15,544,670,820.56/142,628.48
6. Step 6: Final answer
   x = 108,987.14