Finding the Fourth Proportional to 13,087.37, 18,061.04 and 7,499.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.37 : 18,061.04 = 7,499.45 : x
2. Step 2: Convert to fraction form
   13,087.37/18,061.04 = 7,499.45/x
3. Step 3: Cross multiply
   13,087.37x = 18,061.04 × 7,499.45
4. Step 4: Simplify right side
   13,087.37x = 135,447,776.12
5. Step 5: Solve for x
   x = 135,447,776.12/13,087.37
6. Step 6: Final answer
   x = 10,349.51