Finding the Fourth Proportional to 1,917.78, 2,642.85 and 1,364.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.78 : 2,642.85 = 1,364.82 : x
2. Step 2: Convert to fraction form
   1,917.78/2,642.85 = 1,364.82/x
3. Step 3: Cross multiply
   1,917.78x = 2,642.85 × 1,364.82
4. Step 4: Simplify right side
   1,917.78x = 3,607,014.54
5. Step 5: Solve for x
   x = 3,607,014.54/1,917.78
6. Step 6: Final answer
   x = 1,880.83