Finding the Fourth Proportional to 10,007.88, 15,012.72 and 2,987.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,007.88 : 15,012.72 = 2,987.76 : x
2. Step 2: Convert to fraction form
   10,007.88/15,012.72 = 2,987.76/x
3. Step 3: Cross multiply
   10,007.88x = 15,012.72 × 2,987.76
4. Step 4: Simplify right side
   10,007.88x = 44,854,404.31
5. Step 5: Solve for x
   x = 44,854,404.31/10,007.88
6. Step 6: Final answer
   x = 4,481.91