Finding the Fourth Proportional to 9,128.33, 12,597.68 and 5,147.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.33 : 12,597.68 = 5,147.99 : x
2. Step 2: Convert to fraction form
   9,128.33/12,597.68 = 5,147.99/x
3. Step 3: Cross multiply
   9,128.33x = 12,597.68 × 5,147.99
4. Step 4: Simplify right side
   9,128.33x = 64,852,698.83
5. Step 5: Solve for x
   x = 64,852,698.83/9,128.33
6. Step 6: Final answer
   x = 7,104.55