Finding the Fourth Proportional to 1,421.34, 1,961.70 and 1,064.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.34 : 1,961.70 = 1,064.22 : x
2. Step 2: Convert to fraction form
   1,421.34/1,961.70 = 1,064.22/x
3. Step 3: Cross multiply
   1,421.34x = 1,961.70 × 1,064.22
4. Step 4: Simplify right side
   1,421.34x = 2,087,680.37
5. Step 5: Solve for x
   x = 2,087,680.37/1,421.34
6. Step 6: Final answer
   x = 1,468.81