Finding the Fourth Proportional to 9,128.47, 12,599.24 and 5,769.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.47 : 12,599.24 = 5,769.14 : x
2. Step 2: Convert to fraction form
   9,128.47/12,599.24 = 5,769.14/x
3. Step 3: Cross multiply
   9,128.47x = 12,599.24 × 5,769.14
4. Step 4: Simplify right side
   9,128.47x = 72,686,779.45
5. Step 5: Solve for x
   x = 72,686,779.45/9,128.47
6. Step 6: Final answer
   x = 7,962.65