Finding the Fourth Proportional to 1,678.35, 2,513.61 and 1,156.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.35 : 2,513.61 = 1,156.44 : x
2. Step 2: Convert to fraction form
   1,678.35/2,513.61 = 1,156.44/x
3. Step 3: Cross multiply
   1,678.35x = 2,513.61 × 1,156.44
4. Step 4: Simplify right side
   1,678.35x = 2,906,839.15
5. Step 5: Solve for x
   x = 2,906,839.15/1,678.35
6. Step 6: Final answer
   x = 1,731.96