Finding the Fourth Proportional to 142,151.56, 196,164.01 and 78,487.99

Step by Step Solution

1. Step 1: Write the proportion equation
   142,151.56 : 196,164.01 = 78,487.99 : x
2. Step 2: Convert to fraction form
   142,151.56/196,164.01 = 78,487.99/x
3. Step 3: Cross multiply
   142,151.56x = 196,164.01 × 78,487.99
4. Step 4: Simplify right side
   142,151.56x = 15,396,518,855.24
5. Step 5: Solve for x
   x = 15,396,518,855.24/142,151.56
6. Step 6: Final answer
   x = 108,310.59