Finding the Fourth Proportional to 1,667.31, 2,486.02 and 1,603.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.31 : 2,486.02 = 1,603.11 : x
2. Step 2: Convert to fraction form
   1,667.31/2,486.02 = 1,603.11/x
3. Step 3: Cross multiply
   1,667.31x = 2,486.02 × 1,603.11
4. Step 4: Simplify right side
   1,667.31x = 3,985,359.51
5. Step 5: Solve for x
   x = 3,985,359.51/1,667.31
6. Step 6: Final answer
   x = 2,390.29