Finding the Fourth Proportional to 142,596.56, 196,774.80 and 78,930.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,596.56 : 196,774.80 = 78,930.56 : x
2. Step 2: Convert to fraction form
   142,596.56/196,774.80 = 78,930.56/x
3. Step 3: Cross multiply
   142,596.56x = 196,774.80 × 78,930.56
4. Step 4: Simplify right side
   142,596.56x = 15,531,545,157.89
5. Step 5: Solve for x
   x = 15,531,545,157.89/142,596.56
6. Step 6: Final answer
   x = 108,919.49