Finding the Fourth Proportional to 1,914.33, 2,643.34 and 1,207.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.33 : 2,643.34 = 1,207.31 : x
2. Step 2: Convert to fraction form
   1,914.33/2,643.34 = 1,207.31/x
3. Step 3: Cross multiply
   1,914.33x = 2,643.34 × 1,207.31
4. Step 4: Simplify right side
   1,914.33x = 3,191,330.82
5. Step 5: Solve for x
   x = 3,191,330.82/1,914.33
6. Step 6: Final answer
   x = 1,667.07