Finding the Fourth Proportional to 13,090.10, 18,061.89 and 7,786.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,090.10 : 18,061.89 = 7,786.22 : x
2. Step 2: Convert to fraction form
   13,090.10/18,061.89 = 7,786.22/x
3. Step 3: Cross multiply
   13,090.10x = 18,061.89 × 7,786.22
4. Step 4: Simplify right side
   13,090.10x = 140,633,849.16
5. Step 5: Solve for x
   x = 140,633,849.16/13,090.10
6. Step 6: Final answer
   x = 10,743.53