Finding the Fourth Proportional to 9,291.34, 12,821.42 and 5,099.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,291.34 : 12,821.42 = 5,099.86 : x
2. Step 2: Convert to fraction form
   9,291.34/12,821.42 = 5,099.86/x
3. Step 3: Cross multiply
   9,291.34x = 12,821.42 × 5,099.86
4. Step 4: Simplify right side
   9,291.34x = 65,387,447.00
5. Step 5: Solve for x
   x = 65,387,447.00/9,291.34
6. Step 6: Final answer
   x = 7,037.46