Finding the Fourth Proportional to 9,290.59, 12,820.54 and 5,513.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,290.59 : 12,820.54 = 5,513.91 : x
2. Step 2: Convert to fraction form
   9,290.59/12,820.54 = 5,513.91/x
3. Step 3: Cross multiply
   9,290.59x = 12,820.54 × 5,513.91
4. Step 4: Simplify right side
   9,290.59x = 70,691,303.71
5. Step 5: Solve for x
   x = 70,691,303.71/9,290.59
6. Step 6: Final answer
   x = 7,608.91