Finding the Third Proportional to 1,618.10 and 3,491.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.10 : 3,491.86 = 3,491.86 : x
2. Step 2: Convert to fraction form
   1,618.10/3,491.86 = 3,491.86/x
3. Step 3: Cross multiply
   1,618.10x = 3,491.86 × 3,491.86
4. Step 4: Simplify right side
   1,618.10x = 12,193,081.89
5. Step 5: Solve for x
   x = 12,193,081.89/1,618.10
6. Step 6: Final answer
   x = 7,535.42