Finding the Fourth Proportional to 15,300.45, 21,111.78 and 10,271.97

Step by Step Solution

1. Step 1: Write the proportion equation
   15,300.45 : 21,111.78 = 10,271.97 : x
2. Step 2: Convert to fraction form
   15,300.45/21,111.78 = 10,271.97/x
3. Step 3: Cross multiply
   15,300.45x = 21,111.78 × 10,271.97
4. Step 4: Simplify right side
   15,300.45x = 216,859,570.81
5. Step 5: Solve for x
   x = 216,859,570.81/15,300.45
6. Step 6: Final answer
   x = 14,173.41