Finding the Fourth Proportional to 142,606.96, 196,799.16 and 78,945.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,606.96 : 196,799.16 = 78,945.88 : x
2. Step 2: Convert to fraction form
   142,606.96/196,799.16 = 78,945.88/x
3. Step 3: Cross multiply
   142,606.96x = 196,799.16 × 78,945.88
4. Step 4: Simplify right side
   142,606.96x = 15,536,482,869.46
5. Step 5: Solve for x
   x = 15,536,482,869.46/142,606.96
6. Step 6: Final answer
   x = 108,946.18