Finding the Fourth Proportional to 2,188.53, 3,279.69 and 1,091.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.53 : 3,279.69 = 1,091.34 : x
2. Step 2: Convert to fraction form
   2,188.53/3,279.69 = 1,091.34/x
3. Step 3: Cross multiply
   2,188.53x = 3,279.69 × 1,091.34
4. Step 4: Simplify right side
   2,188.53x = 3,579,256.88
5. Step 5: Solve for x
   x = 3,579,256.88/2,188.53
6. Step 6: Final answer
   x = 1,635.46