Finding the Fourth Proportional to 1,355.94, 1,868.60 and 907.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.94 : 1,868.60 = 907.34 : x
2. Step 2: Convert to fraction form
   1,355.94/1,868.60 = 907.34/x
3. Step 3: Cross multiply
   1,355.94x = 1,868.60 × 907.34
4. Step 4: Simplify right side
   1,355.94x = 1,695,448.45
5. Step 5: Solve for x
   x = 1,695,448.45/1,355.94
6. Step 6: Final answer
   x = 1,250.39