Finding the Fourth Proportional to 2,191.57, 3,288.13 and 1,368.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.57 : 3,288.13 = 1,368.88 : x
2. Step 2: Convert to fraction form
   2,191.57/3,288.13 = 1,368.88/x
3. Step 3: Cross multiply
   2,191.57x = 3,288.13 × 1,368.88
4. Step 4: Simplify right side
   2,191.57x = 4,501,062.25
5. Step 5: Solve for x
   x = 4,501,062.25/2,191.57
6. Step 6: Final answer
   x = 2,053.80