Finding the Fourth Proportional to 13,258.10, 18,297.35 and 7,290.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,258.10 : 18,297.35 = 7,290.83 : x
2. Step 2: Convert to fraction form
   13,258.10/18,297.35 = 7,290.83/x
3. Step 3: Cross multiply
   13,258.10x = 18,297.35 × 7,290.83
4. Step 4: Simplify right side
   13,258.10x = 133,402,868.30
5. Step 5: Solve for x
   x = 133,402,868.30/13,258.10
6. Step 6: Final answer
   x = 10,061.99