Finding the Fourth Proportional to 208,578.30, 287,838.38 and 113,085.24

Step by Step Solution

1. Step 1: Write the proportion equation
   208,578.30 : 287,838.38 = 113,085.24 : x
2. Step 2: Convert to fraction form
   208,578.30/287,838.38 = 113,085.24/x
3. Step 3: Cross multiply
   208,578.30x = 287,838.38 × 113,085.24
4. Step 4: Simplify right side
   208,578.30x = 32,550,271,486.83
5. Step 5: Solve for x
   x = 32,550,271,486.83/208,578.30
6. Step 6: Final answer
   x = 156,057.81