Finding the Fourth Proportional to 1,068.78, 1,604.52 and 907.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.78 : 1,604.52 = 907.46 : x
2. Step 2: Convert to fraction form
   1,068.78/1,604.52 = 907.46/x
3. Step 3: Cross multiply
   1,068.78x = 1,604.52 × 907.46
4. Step 4: Simplify right side
   1,068.78x = 1,456,037.72
5. Step 5: Solve for x
   x = 1,456,037.72/1,068.78
6. Step 6: Final answer
   x = 1,362.34