Finding the Fourth Proportional to 1,947.15, 2,922.56 and 907.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.15 : 2,922.56 = 907.87 : x
2. Step 2: Convert to fraction form
   1,947.15/2,922.56 = 907.87/x
3. Step 3: Cross multiply
   1,947.15x = 2,922.56 × 907.87
4. Step 4: Simplify right side
   1,947.15x = 2,653,304.55
5. Step 5: Solve for x
   x = 2,653,304.55/1,947.15
6. Step 6: Final answer
   x = 1,362.66