Finding the Fourth Proportional to 13,698.50, 18,903.91 and 7,410.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,698.50 : 18,903.91 = 7,410.87 : x
2. Step 2: Convert to fraction form
   13,698.50/18,903.91 = 7,410.87/x
3. Step 3: Cross multiply
   13,698.50x = 18,903.91 × 7,410.87
4. Step 4: Simplify right side
   13,698.50x = 140,094,400.97
5. Step 5: Solve for x
   x = 140,094,400.97/13,698.50
6. Step 6: Final answer
   x = 10,226.99