Finding the Fourth Proportional to 209,111.82, 288,578.61 and 113,624.70

Step by Step Solution

1. Step 1: Write the proportion equation
   209,111.82 : 288,578.61 = 113,624.70 : x
2. Step 2: Convert to fraction form
   209,111.82/288,578.61 = 113,624.70/x
3. Step 3: Cross multiply
   209,111.82x = 288,578.61 × 113,624.70
4. Step 4: Simplify right side
   209,111.82x = 32,789,657,987.67
5. Step 5: Solve for x
   x = 32,789,657,987.67/209,111.82
6. Step 6: Final answer
   x = 156,804.42