Finding the Fourth Proportional to 1,653.15, 2,179.89 and 1,653.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,653.15 : 2,179.89 = 1,653.15 : x
2. Step 2: Convert to fraction form
   1,653.15/2,179.89 = 1,653.15/x
3. Step 3: Cross multiply
   1,653.15x = 2,179.89 × 1,653.15
4. Step 4: Simplify right side
   1,653.15x = 3,603,685.15
5. Step 5: Solve for x
   x = 3,603,685.15/1,653.15
6. Step 6: Final answer
   x = 2,179.89