Finding the Fourth Proportional to 13,448.05, 18,558.70 and 7,480.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,448.05 : 18,558.70 = 7,480.10 : x
2. Step 2: Convert to fraction form
   13,448.05/18,558.70 = 7,480.10/x
3. Step 3: Cross multiply
   13,448.05x = 18,558.70 × 7,480.10
4. Step 4: Simplify right side
   13,448.05x = 138,820,959.57
5. Step 5: Solve for x
   x = 138,820,959.57/13,448.05
6. Step 6: Final answer
   x = 10,322.76