Finding the Fourth Proportional to 21,638.01, 32,458.23 and 10,554.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,638.01 : 32,458.23 = 10,554.18 : x
2. Step 2: Convert to fraction form
   21,638.01/32,458.23 = 10,554.18/x
3. Step 3: Cross multiply
   21,638.01x = 32,458.23 × 10,554.18
4. Step 4: Simplify right side
   21,638.01x = 342,570,001.90
5. Step 5: Solve for x
   x = 342,570,001.90/21,638.01
6. Step 6: Final answer
   x = 15,831.86