Finding the Fourth Proportional to 2,092.78, 2,889.29 and 1,307.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.78 : 2,889.29 = 1,307.89 : x
2. Step 2: Convert to fraction form
   2,092.78/2,889.29 = 1,307.89/x
3. Step 3: Cross multiply
   2,092.78x = 2,889.29 × 1,307.89
4. Step 4: Simplify right side
   2,092.78x = 3,778,873.50
5. Step 5: Solve for x
   x = 3,778,873.50/2,092.78
6. Step 6: Final answer
   x = 1,805.67