Finding the Fourth Proportional to 1,947.57, 2,917.84 and 1,069.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.57 : 2,917.84 = 1,069.12 : x
2. Step 2: Convert to fraction form
   1,947.57/2,917.84 = 1,069.12/x
3. Step 3: Cross multiply
   1,947.57x = 2,917.84 × 1,069.12
4. Step 4: Simplify right side
   1,947.57x = 3,119,521.10
5. Step 5: Solve for x
   x = 3,119,521.10/1,947.57
6. Step 6: Final answer
   x = 1,601.75