Finding the Fourth Proportional to 1,377.54, 1,901.16 and 957.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.54 : 1,901.16 = 957.78 : x
2. Step 2: Convert to fraction form
   1,377.54/1,901.16 = 957.78/x
3. Step 3: Cross multiply
   1,377.54x = 1,901.16 × 957.78
4. Step 4: Simplify right side
   1,377.54x = 1,820,893.02
5. Step 5: Solve for x
   x = 1,820,893.02/1,377.54
6. Step 6: Final answer
   x = 1,321.84