Finding the Fourth Proportional to 18,090.31, 27,139.37 and 5,610.09

Step by Step Solution

1. Step 1: Write the proportion equation
   18,090.31 : 27,139.37 = 5,610.09 : x
2. Step 2: Convert to fraction form
   18,090.31/27,139.37 = 5,610.09/x
3. Step 3: Cross multiply
   18,090.31x = 27,139.37 × 5,610.09
4. Step 4: Simplify right side
   18,090.31x = 152,254,308.24
5. Step 5: Solve for x
   x = 152,254,308.24/18,090.31
6. Step 6: Final answer
   x = 8,416.35