Finding the Fourth Proportional to 12,954.58, 17,878.78 and 7,290.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,954.58 : 17,878.78 = 7,290.71 : x
2. Step 2: Convert to fraction form
   12,954.58/17,878.78 = 7,290.71/x
3. Step 3: Cross multiply
   12,954.58x = 17,878.78 × 7,290.71
4. Step 4: Simplify right side
   12,954.58x = 130,348,945.89
5. Step 5: Solve for x
   x = 130,348,945.89/12,954.58
6. Step 6: Final answer
   x = 10,061.99