Finding the Fourth Proportional to 42,575.76, 58,743.36 and 28,404

Step by Step Solution

1. Step 1: Write the proportion equation
   42,575.76 : 58,743.36 = 28,404 : x
2. Step 2: Convert to fraction form
   42,575.76/58,743.36 = 28,404/x
3. Step 3: Cross multiply
   42,575.76x = 58,743.36 × 28,404
4. Step 4: Simplify right side
   42,575.76x = 1,668,546,397.44
5. Step 5: Solve for x
   x = 1,668,546,397.44/42,575.76
6. Step 6: Final answer
   x = 39,190.06