Finding the Fourth Proportional to 21,628.07, 32,435.41 and 9,147.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,628.07 : 32,435.41 = 9,147.89 : x
2. Step 2: Convert to fraction form
   21,628.07/32,435.41 = 9,147.89/x
3. Step 3: Cross multiply
   21,628.07x = 32,435.41 × 9,147.89
4. Step 4: Simplify right side
   21,628.07x = 296,715,562.78
5. Step 5: Solve for x
   x = 296,715,562.78/21,628.07
6. Step 6: Final answer
   x = 13,719.00