Finding the Fourth Proportional to 142,301, 196,358.64 and 78,635

Step by Step Solution

1. Step 1: Write the proportion equation
   142,301 : 196,358.64 = 78,635 : x
2. Step 2: Convert to fraction form
   142,301/196,358.64 = 78,635/x
3. Step 3: Cross multiply
   142,301x = 196,358.64 × 78,635
4. Step 4: Simplify right side
   142,301x = 15,440,661,656.40
5. Step 5: Solve for x
   x = 15,440,661,656.40/142,301
6. Step 6: Final answer
   x = 108,507.05