Finding the Fourth Proportional to 2,091.78, 2,888.61 and 1,347.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.78 : 2,888.61 = 1,347.03 : x
2. Step 2: Convert to fraction form
   2,091.78/2,888.61 = 1,347.03/x
3. Step 3: Cross multiply
   2,091.78x = 2,888.61 × 1,347.03
4. Step 4: Simplify right side
   2,091.78x = 3,891,050.11
5. Step 5: Solve for x
   x = 3,891,050.11/2,091.78
6. Step 6: Final answer
   x = 1,860.16