Finding the Fourth Proportional to 3,665.70, 5,499.27 and 1,200.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.70 : 5,499.27 = 1,200.51 : x
2. Step 2: Convert to fraction form
   3,665.70/5,499.27 = 1,200.51/x
3. Step 3: Cross multiply
   3,665.70x = 5,499.27 × 1,200.51
4. Step 4: Simplify right side
   3,665.70x = 6,601,928.63
5. Step 5: Solve for x
   x = 6,601,928.63/3,665.70
6. Step 6: Final answer
   x = 1,801.00