Finding the Fourth Proportional to 13,126.27, 19,678.51 and 5,223.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,126.27 : 19,678.51 = 5,223.91 : x
2. Step 2: Convert to fraction form
   13,126.27/19,678.51 = 5,223.91/x
3. Step 3: Cross multiply
   13,126.27x = 19,678.51 × 5,223.91
4. Step 4: Simplify right side
   13,126.27x = 102,798,765.17
5. Step 5: Solve for x
   x = 102,798,765.17/13,126.27
6. Step 6: Final answer
   x = 7,831.53