Finding the Fourth Proportional to 9,291.42, 12,821.30 and 5,513.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,291.42 : 12,821.30 = 5,513.93 : x
2. Step 2: Convert to fraction form
   9,291.42/12,821.30 = 5,513.93/x
3. Step 3: Cross multiply
   9,291.42x = 12,821.30 × 5,513.93
4. Step 4: Simplify right side
   9,291.42x = 70,695,750.71
5. Step 5: Solve for x
   x = 70,695,750.71/9,291.42
6. Step 6: Final answer
   x = 7,608.71