Finding the Fourth Proportional to 7,021.86, 10,532.71 and 2,860.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,021.86 : 10,532.71 = 2,860.89 : x
2. Step 2: Convert to fraction form
   7,021.86/10,532.71 = 2,860.89/x
3. Step 3: Cross multiply
   7,021.86x = 10,532.71 × 2,860.89
4. Step 4: Simplify right side
   7,021.86x = 30,132,924.71
5. Step 5: Solve for x
   x = 30,132,924.71/7,021.86
6. Step 6: Final answer
   x = 4,291.30