Finding the Fourth Proportional to 142,483.40, 196,628.82 and 78,819.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,483.40 : 196,628.82 = 78,819.56 : x
2. Step 2: Convert to fraction form
   142,483.40/196,628.82 = 78,819.56/x
3. Step 3: Cross multiply
   142,483.40x = 196,628.82 × 78,819.56
4. Step 4: Simplify right side
   142,483.40x = 15,498,197,075.72
5. Step 5: Solve for x
   x = 15,498,197,075.72/142,483.40
6. Step 6: Final answer
   x = 108,771.95