Finding the Fourth Proportional to 42,388.62, 58,504.37 and 28,048.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,388.62 : 58,504.37 = 28,048.74 : x
2. Step 2: Convert to fraction form
   42,388.62/58,504.37 = 28,048.74/x
3. Step 3: Cross multiply
   42,388.62x = 58,504.37 × 28,048.74
4. Step 4: Simplify right side
   42,388.62x = 1,640,973,430.23
5. Step 5: Solve for x
   x = 1,640,973,430.23/42,388.62
6. Step 6: Final answer
   x = 38,712.59