Finding the Fourth Proportional to 9,090.91, 12,545.53 and 5,111.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.91 : 12,545.53 = 5,111.99 : x
2. Step 2: Convert to fraction form
   9,090.91/12,545.53 = 5,111.99/x
3. Step 3: Cross multiply
   9,090.91x = 12,545.53 × 5,111.99
4. Step 4: Simplify right side
   9,090.91x = 64,132,548.40
5. Step 5: Solve for x
   x = 64,132,548.40/9,090.91
6. Step 6: Final answer
   x = 7,054.58