Finding the Fourth Proportional to 10,139.53, 15,210.51 and 3,898.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.53 : 15,210.51 = 3,898.09 : x
2. Step 2: Convert to fraction form
   10,139.53/15,210.51 = 3,898.09/x
3. Step 3: Cross multiply
   10,139.53x = 15,210.51 × 3,898.09
4. Step 4: Simplify right side
   10,139.53x = 59,291,936.93
5. Step 5: Solve for x
   x = 59,291,936.93/10,139.53
6. Step 6: Final answer
   x = 5,847.60