Finding the Fourth Proportional to 142,488.30, 196,632.99 and 78,824.73

Step by Step Solution

1. Step 1: Write the proportion equation
   142,488.30 : 196,632.99 = 78,824.73 : x
2. Step 2: Convert to fraction form
   142,488.30/196,632.99 = 78,824.73/x
3. Step 3: Cross multiply
   142,488.30x = 196,632.99 × 78,824.73
4. Step 4: Simplify right side
   142,488.30x = 15,499,542,345.84
5. Step 5: Solve for x
   x = 15,499,542,345.84/142,488.30
6. Step 6: Final answer
   x = 108,777.65