Finding the Fourth Proportional to 13,321.19, 18,404.18 and 10,145.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.19 : 18,404.18 = 10,145.25 : x
2. Step 2: Convert to fraction form
   13,321.19/18,404.18 = 10,145.25/x
3. Step 3: Cross multiply
   13,321.19x = 18,404.18 × 10,145.25
4. Step 4: Simplify right side
   13,321.19x = 186,714,994.46
5. Step 5: Solve for x
   x = 186,714,994.46/13,321.19
6. Step 6: Final answer
   x = 14,016.39