Finding the Fourth Proportional to 9,090.64, 12,545.94 and 5,112.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.64 : 12,545.94 = 5,112.10 : x
2. Step 2: Convert to fraction form
   9,090.64/12,545.94 = 5,112.10/x
3. Step 3: Cross multiply
   9,090.64x = 12,545.94 × 5,112.10
4. Step 4: Simplify right side
   9,090.64x = 64,136,099.87
5. Step 5: Solve for x
   x = 64,136,099.87/9,090.64
6. Step 6: Final answer
   x = 7,055.18