Finding the Fourth Proportional to 13,108.90, 18,090.63 and 7,443.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,108.90 : 18,090.63 = 7,443.46 : x
2. Step 2: Convert to fraction form
   13,108.90/18,090.63 = 7,443.46/x
3. Step 3: Cross multiply
   13,108.90x = 18,090.63 × 7,443.46
4. Step 4: Simplify right side
   13,108.90x = 134,656,880.78
5. Step 5: Solve for x
   x = 134,656,880.78/13,108.90
6. Step 6: Final answer
   x = 10,272.17