Finding the Fourth Proportional to 3,667.64, 5,061.20 and 1,989.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.64 : 5,061.20 = 1,989.02 : x
2. Step 2: Convert to fraction form
   3,667.64/5,061.20 = 1,989.02/x
3. Step 3: Cross multiply
   3,667.64x = 5,061.20 × 1,989.02
4. Step 4: Simplify right side
   3,667.64x = 10,066,807.69
5. Step 5: Solve for x
   x = 10,066,807.69/3,667.64
6. Step 6: Final answer
   x = 2,744.77