Finding the Fourth Proportional to 1,421.84, 1,962.39 and 1,064.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.84 : 1,962.39 = 1,064.72 : x
2. Step 2: Convert to fraction form
   1,421.84/1,962.39 = 1,064.72/x
3. Step 3: Cross multiply
   1,421.84x = 1,962.39 × 1,064.72
4. Step 4: Simplify right side
   1,421.84x = 2,089,395.88
5. Step 5: Solve for x
   x = 2,089,395.88/1,421.84
6. Step 6: Final answer
   x = 1,469.50