Finding the Fourth Proportional to 15,428.00, 23,151.56 and 7,109.21

Step by Step Solution

1. Step 1: Write the proportion equation
   15,428.00 : 23,151.56 = 7,109.21 : x
2. Step 2: Convert to fraction form
   15,428.00/23,151.56 = 7,109.21/x
3. Step 3: Cross multiply
   15,428.00x = 23,151.56 × 7,109.21
4. Step 4: Simplify right side
   15,428.00x = 164,589,150.56
5. Step 5: Solve for x
   x = 164,589,150.56/15,428.00
6. Step 6: Final answer
   x = 10,668.21