Finding the Fourth Proportional to 142,607.96, 196,800.54 and 78,946.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,607.96 : 196,800.54 = 78,946.88 : x
2. Step 2: Convert to fraction form
   142,607.96/196,800.54 = 78,946.88/x
3. Step 3: Cross multiply
   142,607.96x = 196,800.54 × 78,946.88
4. Step 4: Simplify right side
   142,607.96x = 15,536,788,615.32
5. Step 5: Solve for x
   x = 15,536,788,615.32/142,607.96
6. Step 6: Final answer
   x = 108,947.56