Finding the Fourth Proportional to 30,150.72, 41,571.84 and 28,488

Step by Step Solution

1. Step 1: Write the proportion equation
   30,150.72 : 41,571.84 = 28,488 : x
2. Step 2: Convert to fraction form
   30,150.72/41,571.84 = 28,488/x
3. Step 3: Cross multiply
   30,150.72x = 41,571.84 × 28,488
4. Step 4: Simplify right side
   30,150.72x = 1,184,298,577.92
5. Step 5: Solve for x
   x = 1,184,298,577.92/30,150.72
6. Step 6: Final answer
   x = 39,279.28