Finding the Fourth Proportional to 1,667.58, 2,497.10 and 1,618.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.58 : 2,497.10 = 1,618.31 : x
2. Step 2: Convert to fraction form
   1,667.58/2,497.10 = 1,618.31/x
3. Step 3: Cross multiply
   1,667.58x = 2,497.10 × 1,618.31
4. Step 4: Simplify right side
   1,667.58x = 4,041,061.32
5. Step 5: Solve for x
   x = 4,041,061.32/1,667.58
6. Step 6: Final answer
   x = 2,423.31