Finding the Fourth Proportional to 1,384.56, 2,061.72 and 1,313.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.56 : 2,061.72 = 1,313.28 : x
2. Step 2: Convert to fraction form
   1,384.56/2,061.72 = 1,313.28/x
3. Step 3: Cross multiply
   1,384.56x = 2,061.72 × 1,313.28
4. Step 4: Simplify right side
   1,384.56x = 2,707,615.64
5. Step 5: Solve for x
   x = 2,707,615.64/1,384.56
6. Step 6: Final answer
   x = 1,955.58