Finding the Fourth Proportional to 155,105.48, 213,991.06 and 101,421.92

Step by Step Solution

1. Step 1: Write the proportion equation
   155,105.48 : 213,991.06 = 101,421.92 : x
2. Step 2: Convert to fraction form
   155,105.48/213,991.06 = 101,421.92/x
3. Step 3: Cross multiply
   155,105.48x = 213,991.06 × 101,421.92
4. Step 4: Simplify right side
   155,105.48x = 21,703,384,168.04
5. Step 5: Solve for x
   x = 21,703,384,168.04/155,105.48
6. Step 6: Final answer
   x = 139,926.61