Finding the Fourth Proportional to 142,948, 197,139.12 and 89,237.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,948 : 197,139.12 = 89,237.98 : x
2. Step 2: Convert to fraction form
   142,948/197,139.12 = 89,237.98/x
3. Step 3: Cross multiply
   142,948x = 197,139.12 × 89,237.98
4. Step 4: Simplify right side
   142,948x = 17,592,296,847.78
5. Step 5: Solve for x
   x = 17,592,296,847.78/142,948
6. Step 6: Final answer
   x = 123,067.81