Finding the Fourth Proportional to 142,025.51, 195,912.55 and 91,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,025.51 : 195,912.55 = 91,020.12 : x
2. Step 2: Convert to fraction form
   142,025.51/195,912.55 = 91,020.12/x
3. Step 3: Cross multiply
   142,025.51x = 195,912.55 × 91,020.12
4. Step 4: Simplify right side
   142,025.51x = 17,831,983,189.61
5. Step 5: Solve for x
   x = 17,831,983,189.61/142,025.51
6. Step 6: Final answer
   x = 125,554.79