Finding the Fourth Proportional to 2,887.33, 4,330.38 and 913.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,887.33 : 4,330.38 = 913.12 : x
2. Step 2: Convert to fraction form
   2,887.33/4,330.38 = 913.12/x
3. Step 3: Cross multiply
   2,887.33x = 4,330.38 × 913.12
4. Step 4: Simplify right side
   2,887.33x = 3,954,156.59
5. Step 5: Solve for x
   x = 3,954,156.59/2,887.33
6. Step 6: Final answer
   x = 1,369.49