Finding the Fourth Proportional to 15,710.34, 21,667.98 and 9,738.63

Step by Step Solution

1. Step 1: Write the proportion equation
   15,710.34 : 21,667.98 = 9,738.63 : x
2. Step 2: Convert to fraction form
   15,710.34/21,667.98 = 9,738.63/x
3. Step 3: Cross multiply
   15,710.34x = 21,667.98 × 9,738.63
4. Step 4: Simplify right side
   15,710.34x = 211,016,440.07
5. Step 5: Solve for x
   x = 211,016,440.07/15,710.34
6. Step 6: Final answer
   x = 13,431.69