Finding the Fourth Proportional to 12,955.55, 17,878.25 and 7,290.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.55 : 17,878.25 = 7,290.62 : x
2. Step 2: Convert to fraction form
   12,955.55/17,878.25 = 7,290.62/x
3. Step 3: Cross multiply
   12,955.55x = 17,878.25 × 7,290.62
4. Step 4: Simplify right side
   12,955.55x = 130,343,401.17
5. Step 5: Solve for x
   x = 130,343,401.17/12,955.55
6. Step 6: Final answer
   x = 10,060.82