Finding the Fourth Proportional to 911.34, 1,357.89 and 907.69

Step by Step Solution

1. Step 1: Write the proportion equation
   911.34 : 1,357.89 = 907.69 : x
2. Step 2: Convert to fraction form
   911.34/1,357.89 = 907.69/x
3. Step 3: Cross multiply
   911.34x = 1,357.89 × 907.69
4. Step 4: Simplify right side
   911.34x = 1,232,543.17
5. Step 5: Solve for x
   x = 1,232,543.17/911.34
6. Step 6: Final answer
   x = 1,352.45