Finding the Fourth Proportional to 9,099.31, 12,557.00 and 5,120.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.31 : 12,557.00 = 5,120.49 : x
2. Step 2: Convert to fraction form
   9,099.31/12,557.00 = 5,120.49/x
3. Step 3: Cross multiply
   9,099.31x = 12,557.00 × 5,120.49
4. Step 4: Simplify right side
   9,099.31x = 64,297,968.24
5. Step 5: Solve for x
   x = 64,297,968.24/9,099.31
6. Step 6: Final answer
   x = 7,066.25