Finding the Fourth Proportional to 13,104.46, 18,090.35 and 7,725.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,104.46 : 18,090.35 = 7,725.25 : x
2. Step 2: Convert to fraction form
   13,104.46/18,090.35 = 7,725.25/x
3. Step 3: Cross multiply
   13,104.46x = 18,090.35 × 7,725.25
4. Step 4: Simplify right side
   13,104.46x = 139,752,476.34
5. Step 5: Solve for x
   x = 139,752,476.34/13,104.46
6. Step 6: Final answer
   x = 10,664.50