Finding the Fourth Proportional to 3,665.51, 5,499.12 and 1,200.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.51 : 5,499.12 = 1,200.32 : x
2. Step 2: Convert to fraction form
   3,665.51/5,499.12 = 1,200.32/x
3. Step 3: Cross multiply
   3,665.51x = 5,499.12 × 1,200.32
4. Step 4: Simplify right side
   3,665.51x = 6,600,703.72
5. Step 5: Solve for x
   x = 6,600,703.72/3,665.51
6. Step 6: Final answer
   x = 1,800.76