Finding the Fourth Proportional to 21,403.48, 32,093.62 and 11,918.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,403.48 : 32,093.62 = 11,918.72 : x
2. Step 2: Convert to fraction form
   21,403.48/32,093.62 = 11,918.72/x
3. Step 3: Cross multiply
   21,403.48x = 32,093.62 × 11,918.72
4. Step 4: Simplify right side
   21,403.48x = 382,514,870.57
5. Step 5: Solve for x
   x = 382,514,870.57/21,403.48
6. Step 6: Final answer
   x = 17,871.62