Finding the Fourth Proportional to 1,609.07, 2,219.00 and 1,278.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.07 : 2,219.00 = 1,278.59 : x
2. Step 2: Convert to fraction form
   1,609.07/2,219.00 = 1,278.59/x
3. Step 3: Cross multiply
   1,609.07x = 2,219.00 × 1,278.59
4. Step 4: Simplify right side
   1,609.07x = 2,837,173.72
5. Step 5: Solve for x
   x = 2,837,173.72/1,609.07
6. Step 6: Final answer
   x = 1,763.24