Finding the Fourth Proportional to 13,698.86, 18,904.47 and 7,411.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,698.86 : 18,904.47 = 7,411.25 : x
2. Step 2: Convert to fraction form
   13,698.86/18,904.47 = 7,411.25/x
3. Step 3: Cross multiply
   13,698.86x = 18,904.47 × 7,411.25
4. Step 4: Simplify right side
   13,698.86x = 140,105,753.29
5. Step 5: Solve for x
   x = 140,105,753.29/13,698.86
6. Step 6: Final answer
   x = 10,227.55