Finding the Fourth Proportional to 1,947.34, 2,920.56 and 906.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.34 : 2,920.56 = 906.69 : x
2. Step 2: Convert to fraction form
   1,947.34/2,920.56 = 906.69/x
3. Step 3: Cross multiply
   1,947.34x = 2,920.56 × 906.69
4. Step 4: Simplify right side
   1,947.34x = 2,648,050.10
5. Step 5: Solve for x
   x = 2,648,050.10/1,947.34
6. Step 6: Final answer
   x = 1,359.83