Finding the Fourth Proportional to 15,521.73, 21,419.89 and 8,448.00

Step by Step Solution

1. Step 1: Write the proportion equation
   15,521.73 : 21,419.89 = 8,448.00 : x
2. Step 2: Convert to fraction form
   15,521.73/21,419.89 = 8,448.00/x
3. Step 3: Cross multiply
   15,521.73x = 21,419.89 × 8,448.00
4. Step 4: Simplify right side
   15,521.73x = 180,955,176.80
5. Step 5: Solve for x
   x = 180,955,176.80/15,521.73
6. Step 6: Final answer
   x = 11,658.19