Finding the Fourth Proportional to 1,947.72, 2,918.53 and 1,126.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.72 : 2,918.53 = 1,126.38 : x
2. Step 2: Convert to fraction form
   1,947.72/2,918.53 = 1,126.38/x
3. Step 3: Cross multiply
   1,947.72x = 2,918.53 × 1,126.38
4. Step 4: Simplify right side
   1,947.72x = 3,287,373.82
5. Step 5: Solve for x
   x = 3,287,373.82/1,947.72
6. Step 6: Final answer
   x = 1,687.81