Finding the Fourth Proportional to 1,112.77, 1,535.57 and 608.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.77 : 1,535.57 = 608.62 : x
2. Step 2: Convert to fraction form
   1,112.77/1,535.57 = 608.62/x
3. Step 3: Cross multiply
   1,112.77x = 1,535.57 × 608.62
4. Step 4: Simplify right side
   1,112.77x = 934,578.61
5. Step 5: Solve for x
   x = 934,578.61/1,112.77
6. Step 6: Final answer
   x = 839.87