Finding the Fourth Proportional to 1,948.72, 2,917.32 and 1,289.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.72 : 2,917.32 = 1,289.36 : x
2. Step 2: Convert to fraction form
   1,948.72/2,917.32 = 1,289.36/x
3. Step 3: Cross multiply
   1,948.72x = 2,917.32 × 1,289.36
4. Step 4: Simplify right side
   1,948.72x = 3,761,475.72
5. Step 5: Solve for x
   x = 3,761,475.72/1,948.72
6. Step 6: Final answer
   x = 1,930.23