Finding the Fourth Proportional to 15,697.31, 21,667.98 and 10,393.84

Step by Step Solution

1. Step 1: Write the proportion equation
   15,697.31 : 21,667.98 = 10,393.84 : x
2. Step 2: Convert to fraction form
   15,697.31/21,667.98 = 10,393.84/x
3. Step 3: Cross multiply
   15,697.31x = 21,667.98 × 10,393.84
4. Step 4: Simplify right side
   15,697.31x = 225,213,517.24
5. Step 5: Solve for x
   x = 225,213,517.24/15,697.31
6. Step 6: Final answer
   x = 14,347.27