Finding the Fourth Proportional to 12,956.36, 17,876.60 and 7,290

Step by Step Solution

1. Step 1: Write the proportion equation
   12,956.36 : 17,876.60 = 7,290 : x
2. Step 2: Convert to fraction form
   12,956.36/17,876.60 = 7,290/x
3. Step 3: Cross multiply
   12,956.36x = 17,876.60 × 7,290
4. Step 4: Simplify right side
   12,956.36x = 130,320,404.89
5. Step 5: Solve for x
   x = 130,320,404.89/12,956.36
6. Step 6: Final answer
   x = 10,058.42