Finding the Fourth Proportional to 155,103.05, 213,987.69 and 101,419.49

Step by Step Solution

1. Step 1: Write the proportion equation
   155,103.05 : 213,987.69 = 101,419.49 : x
2. Step 2: Convert to fraction form
   155,103.05/213,987.69 = 101,419.49/x
3. Step 3: Cross multiply
   155,103.05x = 213,987.69 × 101,419.49
4. Step 4: Simplify right side
   155,103.05x = 21,702,521,316.14
5. Step 5: Solve for x
   x = 21,702,521,316.14/155,103.05
6. Step 6: Final answer
   x = 139,923.24