Finding the Fourth Proportional to 142,308.27, 196,389.48 and 77,781.10

Step by Step Solution

1. Step 1: Write the proportion equation
   142,308.27 : 196,389.48 = 77,781.10 : x
2. Step 2: Convert to fraction form
   142,308.27/196,389.48 = 77,781.10/x
3. Step 3: Cross multiply
   142,308.27x = 196,389.48 × 77,781.10
4. Step 4: Simplify right side
   142,308.27x = 15,275,389,782.83
5. Step 5: Solve for x
   x = 15,275,389,782.83/142,308.27
6. Step 6: Final answer
   x = 107,340.14