Finding the Fourth Proportional to 9,144.86, 12,620.01 and 5,166.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.86 : 12,620.01 = 5,166.02 : x
2. Step 2: Convert to fraction form
   9,144.86/12,620.01 = 5,166.02/x
3. Step 3: Cross multiply
   9,144.86x = 12,620.01 × 5,166.02
4. Step 4: Simplify right side
   9,144.86x = 65,195,224.06
5. Step 5: Solve for x
   x = 65,195,224.06/9,144.86
6. Step 6: Final answer
   x = 7,129.17