Finding the Fourth Proportional to 38,638.62, 57,882.72 and 28,488.51

Step by Step Solution

1. Step 1: Write the proportion equation
   38,638.62 : 57,882.72 = 28,488.51 : x
2. Step 2: Convert to fraction form
   38,638.62/57,882.72 = 28,488.51/x
3. Step 3: Cross multiply
   38,638.62x = 57,882.72 × 28,488.51
4. Step 4: Simplify right side
   38,638.62x = 1,648,992,447.55
5. Step 5: Solve for x
   x = 1,648,992,447.55/38,638.62
6. Step 6: Final answer
   x = 42,677.31