Finding the Fourth Proportional to 2,069.12, 2,856.12 and 1,370.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.12 : 2,856.12 = 1,370.72 : x
2. Step 2: Convert to fraction form
   2,069.12/2,856.12 = 1,370.72/x
3. Step 3: Cross multiply
   2,069.12x = 2,856.12 × 1,370.72
4. Step 4: Simplify right side
   2,069.12x = 3,914,940.81
5. Step 5: Solve for x
   x = 3,914,940.81/2,069.12
6. Step 6: Final answer
   x = 1,892.08