Finding the Fourth Proportional to 1,279.00, 1,909.16 and 1,097.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.00 : 1,909.16 = 1,097.56 : x
2. Step 2: Convert to fraction form
   1,279.00/1,909.16 = 1,097.56/x
3. Step 3: Cross multiply
   1,279.00x = 1,909.16 × 1,097.56
4. Step 4: Simplify right side
   1,279.00x = 2,095,412.88
5. Step 5: Solve for x
   x = 2,095,412.88/1,279.00
6. Step 6: Final answer
   x = 1,638.32