Finding the Fourth Proportional to 13,109.55, 18,090.54 and 7,443.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.55 : 18,090.54 = 7,443.56 : x
2. Step 2: Convert to fraction form
   13,109.55/18,090.54 = 7,443.56/x
3. Step 3: Cross multiply
   13,109.55x = 18,090.54 × 7,443.56
4. Step 4: Simplify right side
   13,109.55x = 134,657,892.25
5. Step 5: Solve for x
   x = 134,657,892.25/13,109.55
6. Step 6: Final answer
   x = 10,271.74