Finding the Fourth Proportional to 1,100.25, 1,647.30 and 907.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.25 : 1,647.30 = 907.57 : x
2. Step 2: Convert to fraction form
   1,100.25/1,647.30 = 907.57/x
3. Step 3: Cross multiply
   1,100.25x = 1,647.30 × 907.57
4. Step 4: Simplify right side
   1,100.25x = 1,495,045.52
5. Step 5: Solve for x
   x = 1,495,045.52/1,100.25
6. Step 6: Final answer
   x = 1,358.82