Finding the Fourth Proportional to 103,530.20, 155,298.73 and 28,644.05

Step by Step Solution

1. Step 1: Write the proportion equation
   103,530.20 : 155,298.73 = 28,644.05 : x
2. Step 2: Convert to fraction form
   103,530.20/155,298.73 = 28,644.05/x
3. Step 3: Cross multiply
   103,530.20x = 155,298.73 × 28,644.05
4. Step 4: Simplify right side
   103,530.20x = 4,448,384,903.69
5. Step 5: Solve for x
   x = 4,448,384,903.69/103,530.20
6. Step 6: Final answer
   x = 42,967.03