Finding the Fourth Proportional to 9,122.90, 12,589.41 and 5,144.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,122.90 : 12,589.41 = 5,144.01 : x
2. Step 2: Convert to fraction form
   9,122.90/12,589.41 = 5,144.01/x
3. Step 3: Cross multiply
   9,122.90x = 12,589.41 × 5,144.01
4. Step 4: Simplify right side
   9,122.90x = 64,760,050.93
5. Step 5: Solve for x
   x = 64,760,050.93/9,122.90
6. Step 6: Final answer
   x = 7,098.63