Finding the Fourth Proportional to 1,420.32, 1,960.56 and 1,071.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.32 : 1,960.56 = 1,071.84 : x
2. Step 2: Convert to fraction form
   1,420.32/1,960.56 = 1,071.84/x
3. Step 3: Cross multiply
   1,420.32x = 1,960.56 × 1,071.84
4. Step 4: Simplify right side
   1,420.32x = 2,101,406.63
5. Step 5: Solve for x
   x = 2,101,406.63/1,420.32
6. Step 6: Final answer
   x = 1,479.53