Finding the Fourth Proportional to 208,073.49, 287,139.38 and 112,578.09

Step by Step Solution

1. Step 1: Write the proportion equation
   208,073.49 : 287,139.38 = 112,578.09 : x
2. Step 2: Convert to fraction form
   208,073.49/287,139.38 = 112,578.09/x
3. Step 3: Cross multiply
   208,073.49x = 287,139.38 × 112,578.09
4. Step 4: Simplify right side
   208,073.49x = 32,325,602,401.29
5. Step 5: Solve for x
   x = 32,325,602,401.29/208,073.49
6. Step 6: Final answer
   x = 155,356.66