Finding the Fourth Proportional to 142,369.56, 196,460.37 and 78,698.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,369.56 : 196,460.37 = 78,698.70 : x
2. Step 2: Convert to fraction form
   142,369.56/196,460.37 = 78,698.70/x
3. Step 3: Cross multiply
   142,369.56x = 196,460.37 × 78,698.70
4. Step 4: Simplify right side
   142,369.56x = 15,461,175,720.52
5. Step 5: Solve for x
   x = 15,461,175,720.52/142,369.56
6. Step 6: Final answer
   x = 108,598.89