Finding the Fourth Proportional to 9,090.34, 12,543.60 and 5,111.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.34 : 12,543.60 = 5,111.23 : x
2. Step 2: Convert to fraction form
   9,090.34/12,543.60 = 5,111.23/x
3. Step 3: Cross multiply
   9,090.34x = 12,543.60 × 5,111.23
4. Step 4: Simplify right side
   9,090.34x = 64,113,224.63
5. Step 5: Solve for x
   x = 64,113,224.63/9,090.34
6. Step 6: Final answer
   x = 7,052.90