Finding the Fourth Proportional to 9,090.55, 12,543.15 and 5,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.55 : 12,543.15 = 5,111.56 : x
2. Step 2: Convert to fraction form
   9,090.55/12,543.15 = 5,111.56/x
3. Step 3: Cross multiply
   9,090.55x = 12,543.15 × 5,111.56
4. Step 4: Simplify right side
   9,090.55x = 64,115,063.81
5. Step 5: Solve for x
   x = 64,115,063.81/9,090.55
6. Step 6: Final answer
   x = 7,052.94