Finding the Fourth Proportional to 14,004.69, 21,009.12 and 5,120.47

Step by Step Solution

1. Step 1: Write the proportion equation
   14,004.69 : 21,009.12 = 5,120.47 : x
2. Step 2: Convert to fraction form
   14,004.69/21,009.12 = 5,120.47/x
3. Step 3: Cross multiply
   14,004.69x = 21,009.12 × 5,120.47
4. Step 4: Simplify right side
   14,004.69x = 107,576,568.69
5. Step 5: Solve for x
   x = 107,576,568.69/14,004.69
6. Step 6: Final answer
   x = 7,681.47