Finding the Fourth Proportional to 1,664.10, 2,334.60 and 1,664.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.10 : 2,334.60 = 1,664.10 : x
2. Step 2: Convert to fraction form
   1,664.10/2,334.60 = 1,664.10/x
3. Step 3: Cross multiply
   1,664.10x = 2,334.60 × 1,664.10
4. Step 4: Simplify right side
   1,664.10x = 3,885,007.86
5. Step 5: Solve for x
   x = 3,885,007.86/1,664.10
6. Step 6: Final answer
   x = 2,334.60