Finding the Fourth Proportional to 13,258.31, 18,296.06 and 7,289.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,258.31 : 18,296.06 = 7,289.15 : x
2. Step 2: Convert to fraction form
   13,258.31/18,296.06 = 7,289.15/x
3. Step 3: Cross multiply
   13,258.31x = 18,296.06 × 7,289.15
4. Step 4: Simplify right side
   13,258.31x = 133,362,597.82
5. Step 5: Solve for x
   x = 133,362,597.82/13,258.31
6. Step 6: Final answer
   x = 10,058.80