Finding the Fourth Proportional to 5,290.56, 7,930.17 and 2,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.56 : 7,930.17 = 2,515.50 : x
2. Step 2: Convert to fraction form
   5,290.56/7,930.17 = 2,515.50/x
3. Step 3: Cross multiply
   5,290.56x = 7,930.17 × 2,515.50
4. Step 4: Simplify right side
   5,290.56x = 19,948,342.64
5. Step 5: Solve for x
   x = 19,948,342.64/5,290.56
6. Step 6: Final answer
   x = 3,770.55