Finding the Fourth Proportional to 1,914.82, 2,643.46 and 1,288.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.82 : 2,643.46 = 1,288.64 : x
2. Step 2: Convert to fraction form
   1,914.82/2,643.46 = 1,288.64/x
3. Step 3: Cross multiply
   1,914.82x = 2,643.46 × 1,288.64
4. Step 4: Simplify right side
   1,914.82x = 3,406,468.29
5. Step 5: Solve for x
   x = 3,406,468.29/1,914.82
6. Step 6: Final answer
   x = 1,779.00