Finding the Fourth Proportional to 142,493.18, 196,646.37 and 78,829.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,493.18 : 196,646.37 = 78,829.88 : x
2. Step 2: Convert to fraction form
   142,493.18/196,646.37 = 78,829.88/x
3. Step 3: Cross multiply
   142,493.18x = 196,646.37 × 78,829.88
4. Step 4: Simplify right side
   142,493.18x = 15,501,609,749.54
5. Step 5: Solve for x
   x = 15,501,609,749.54/142,493.18
6. Step 6: Final answer
   x = 108,788.43