Finding the Fourth Proportional to 7,002.30, 10,503.15 and 2,619.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.30 : 10,503.15 = 2,619.78 : x
2. Step 2: Convert to fraction form
   7,002.30/10,503.15 = 2,619.78/x
3. Step 3: Cross multiply
   7,002.30x = 10,503.15 × 2,619.78
4. Step 4: Simplify right side
   7,002.30x = 27,515,942.31
5. Step 5: Solve for x
   x = 27,515,942.31/7,002.30
6. Step 6: Final answer
   x = 3,929.56