Finding the Fourth Proportional to 9,090.80, 12,597.96 and 8,915.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.80 : 12,597.96 = 8,915.84 : x
2. Step 2: Convert to fraction form
   9,090.80/12,597.96 = 8,915.84/x
3. Step 3: Cross multiply
   9,090.80x = 12,597.96 × 8,915.84
4. Step 4: Simplify right side
   9,090.80x = 112,321,395.69
5. Step 5: Solve for x
   x = 112,321,395.69/9,090.80
6. Step 6: Final answer
   x = 12,355.50