Finding the Fourth Proportional to 209,071.82, 288,519.36 and 113,578.52

Step by Step Solution

1. Step 1: Write the proportion equation
   209,071.82 : 288,519.36 = 113,578.52 : x
2. Step 2: Convert to fraction form
   209,071.82/288,519.36 = 113,578.52/x
3. Step 3: Cross multiply
   209,071.82x = 288,519.36 × 113,578.52
4. Step 4: Simplify right side
   209,071.82x = 32,769,601,900.15
5. Step 5: Solve for x
   x = 32,769,601,900.15/209,071.82
6. Step 6: Final answer
   x = 156,738.49