Finding the Fourth Proportional to 21,185.82, 31,812.66 and 17,479.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,185.82 : 31,812.66 = 17,479.98 : x
2. Step 2: Convert to fraction form
   21,185.82/31,812.66 = 17,479.98/x
3. Step 3: Cross multiply
   21,185.82x = 31,812.66 × 17,479.98
4. Step 4: Simplify right side
   21,185.82x = 556,084,660.55
5. Step 5: Solve for x
   x = 556,084,660.55/21,185.82
6. Step 6: Final answer
   x = 26,247.96