Finding the Fourth Proportional to 142,244.20, 196,300.95 and 78,586.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,244.20 : 196,300.95 = 78,586.10 : x
2. Step 2: Convert to fraction form
   142,244.20/196,300.95 = 78,586.10/x
3. Step 3: Cross multiply
   142,244.20x = 196,300.95 × 78,586.10
4. Step 4: Simplify right side
   142,244.20x = 15,426,525,105.29
5. Step 5: Solve for x
   x = 15,426,525,105.29/142,244.20
6. Step 6: Final answer
   x = 108,451.00