Finding the Fourth Proportional to 142,139.51, 196,149.46 and 77,606.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,139.51 : 196,149.46 = 77,606.25 : x
2. Step 2: Convert to fraction form
   142,139.51/196,149.46 = 77,606.25/x
3. Step 3: Cross multiply
   142,139.51x = 196,149.46 × 77,606.25
4. Step 4: Simplify right side
   142,139.51x = 15,222,422,661.35
5. Step 5: Solve for x
   x = 15,222,422,661.35/142,139.51
6. Step 6: Final answer
   x = 107,094.95