Finding the Fourth Proportional to 1,991.78, 2,748.47 and 1,095.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.78 : 2,748.47 = 1,095.36 : x
2. Step 2: Convert to fraction form
   1,991.78/2,748.47 = 1,095.36/x
3. Step 3: Cross multiply
   1,991.78x = 2,748.47 × 1,095.36
4. Step 4: Simplify right side
   1,991.78x = 3,010,558.62
5. Step 5: Solve for x
   x = 3,010,558.62/1,991.78
6. Step 6: Final answer
   x = 1,511.50