Finding the Fourth Proportional to 142,152.56, 196,165.39 and 78,488.99

Step by Step Solution

1. Step 1: Write the proportion equation
   142,152.56 : 196,165.39 = 78,488.99 : x
2. Step 2: Convert to fraction form
   142,152.56/196,165.39 = 78,488.99/x
3. Step 3: Cross multiply
   142,152.56x = 196,165.39 × 78,488.99
4. Step 4: Simplify right side
   142,152.56x = 15,396,823,334.06
5. Step 5: Solve for x
   x = 15,396,823,334.06/142,152.56
6. Step 6: Final answer
   x = 108,311.97