Finding the Fourth Proportional to 21,448.89, 32,156.06 and 9,145.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,448.89 : 32,156.06 = 9,145.53 : x
2. Step 2: Convert to fraction form
   21,448.89/32,156.06 = 9,145.53/x
3. Step 3: Cross multiply
   21,448.89x = 32,156.06 × 9,145.53
4. Step 4: Simplify right side
   21,448.89x = 294,084,165.68
5. Step 5: Solve for x
   x = 294,084,165.68/21,448.89
6. Step 6: Final answer
   x = 13,710.93