Finding the Fourth Proportional to 10,139.98, 15,209.74 and 4,589.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.98 : 15,209.74 = 4,589.30 : x
2. Step 2: Convert to fraction form
   10,139.98/15,209.74 = 4,589.30/x
3. Step 3: Cross multiply
   10,139.98x = 15,209.74 × 4,589.30
4. Step 4: Simplify right side
   10,139.98x = 69,802,086.33
5. Step 5: Solve for x
   x = 69,802,086.33/10,139.98
6. Step 6: Final answer
   x = 6,883.85