Finding the Fourth Proportional to 209,144.63, 288,611.69 and 113,649.27

Step by Step Solution

1. Step 1: Write the proportion equation
   209,144.63 : 288,611.69 = 113,649.27 : x
2. Step 2: Convert to fraction form
   209,144.63/288,611.69 = 113,649.27/x
3. Step 3: Cross multiply
   209,144.63x = 288,611.69 × 113,649.27
4. Step 4: Simplify right side
   209,144.63x = 32,800,507,313.72
5. Step 5: Solve for x
   x = 32,800,507,313.72/209,144.63
6. Step 6: Final answer
   x = 156,831.70