Finding the Fourth Proportional to 1,384.21, 2,066.15 and 1,222.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.21 : 2,066.15 = 1,222.01 : x
2. Step 2: Convert to fraction form
   1,384.21/2,066.15 = 1,222.01/x
3. Step 3: Cross multiply
   1,384.21x = 2,066.15 × 1,222.01
4. Step 4: Simplify right side
   1,384.21x = 2,524,855.96
5. Step 5: Solve for x
   x = 2,524,855.96/1,384.21
6. Step 6: Final answer
   x = 1,824.04