Finding the Fourth Proportional to 21,374.25, 32,019.86 and 10,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,374.25 : 32,019.86 = 10,288.72 : x
2. Step 2: Convert to fraction form
   21,374.25/32,019.86 = 10,288.72/x
3. Step 3: Cross multiply
   21,374.25x = 32,019.86 × 10,288.72
4. Step 4: Simplify right side
   21,374.25x = 329,443,499.44
5. Step 5: Solve for x
   x = 329,443,499.44/21,374.25
6. Step 6: Final answer
   x = 15,413.10