Finding the Fourth Proportional to 9,144.95, 12,621.06 and 5,166.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.95 : 12,621.06 = 5,166.32 : x
2. Step 2: Convert to fraction form
   9,144.95/12,621.06 = 5,166.32/x
3. Step 3: Cross multiply
   9,144.95x = 12,621.06 × 5,166.32
4. Step 4: Simplify right side
   9,144.95x = 65,204,415.33
5. Step 5: Solve for x
   x = 65,204,415.33/9,144.95
6. Step 6: Final answer
   x = 7,130.10