Finding the Fourth Proportional to 155,103.80, 213,988.72 and 101,420.24

Step by Step Solution

1. Step 1: Write the proportion equation
   155,103.80 : 213,988.72 = 101,420.24 : x
2. Step 2: Convert to fraction form
   155,103.80/213,988.72 = 101,420.24/x
3. Step 3: Cross multiply
   155,103.80x = 213,988.72 × 101,420.24
4. Step 4: Simplify right side
   155,103.80x = 21,702,787,339.69
5. Step 5: Solve for x
   x = 21,702,787,339.69/155,103.80
6. Step 6: Final answer
   x = 139,924.28