Finding the Fourth Proportional to 13,090.82, 18,064.81 and 7,122.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,090.82 : 18,064.81 = 7,122.52 : x
2. Step 2: Convert to fraction form
   13,090.82/18,064.81 = 7,122.52/x
3. Step 3: Cross multiply
   13,090.82x = 18,064.81 × 7,122.52
4. Step 4: Simplify right side
   13,090.82x = 128,666,970.52
5. Step 5: Solve for x
   x = 128,666,970.52/13,090.82
6. Step 6: Final answer
   x = 9,828.79