Finding the Fourth Proportional to 12,955.39, 17,878.04 and 7,290.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.39 : 17,878.04 = 7,290.45 : x
2. Step 2: Convert to fraction form
   12,955.39/17,878.04 = 7,290.45/x
3. Step 3: Cross multiply
   12,955.39x = 17,878.04 × 7,290.45
4. Step 4: Simplify right side
   12,955.39x = 130,338,956.72
5. Step 5: Solve for x
   x = 130,338,956.72/12,955.39
6. Step 6: Final answer
   x = 10,060.60