Finding the Fourth Proportional to 1,200.15, 1,700.33 and 1,200.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.15 : 1,700.33 = 1,200.15 : x
2. Step 2: Convert to fraction form
   1,200.15/1,700.33 = 1,200.15/x
3. Step 3: Cross multiply
   1,200.15x = 1,700.33 × 1,200.15
4. Step 4: Simplify right side
   1,200.15x = 2,040,645.05
5. Step 5: Solve for x
   x = 2,040,645.05/1,200.15
6. Step 6: Final answer
   x = 1,700.33