Finding the Fourth Proportional to 13,099.89, 18,075.45 and 7,434.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,099.89 : 18,075.45 = 7,434.87 : x
2. Step 2: Convert to fraction form
   13,099.89/18,075.45 = 7,434.87/x
3. Step 3: Cross multiply
   13,099.89x = 18,075.45 × 7,434.87
4. Step 4: Simplify right side
   13,099.89x = 134,388,620.94
5. Step 5: Solve for x
   x = 134,388,620.94/13,099.89
6. Step 6: Final answer
   x = 10,258.76