Finding the Fourth Proportional to 142,489.76, 196,635.06 and 78,826.19

Step by Step Solution

1. Step 1: Write the proportion equation
   142,489.76 : 196,635.06 = 78,826.19 : x
2. Step 2: Convert to fraction form
   142,489.76/196,635.06 = 78,826.19/x
3. Step 3: Cross multiply
   142,489.76x = 196,635.06 × 78,826.19
4. Step 4: Simplify right side
   142,489.76x = 15,499,991,617.05
5. Step 5: Solve for x
   x = 15,499,991,617.05/142,489.76
6. Step 6: Final answer
   x = 108,779.69