Finding the Fourth Proportional to 142,152.56, 196,173.06 and 78,486.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,152.56 : 196,173.06 = 78,486.56 : x
2. Step 2: Convert to fraction form
   142,152.56/196,173.06 = 78,486.56/x
3. Step 3: Cross multiply
   142,152.56x = 196,173.06 × 78,486.56
4. Step 4: Simplify right side
   142,152.56x = 15,396,948,644.07
5. Step 5: Solve for x
   x = 15,396,948,644.07/142,152.56
6. Step 6: Final answer
   x = 108,312.85