Finding the Fourth Proportional to 1,632.72, 2,253.16 and 886.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,632.72 : 2,253.16 = 886.70 : x
2. Step 2: Convert to fraction form
   1,632.72/2,253.16 = 886.70/x
3. Step 3: Cross multiply
   1,632.72x = 2,253.16 × 886.70
4. Step 4: Simplify right side
   1,632.72x = 1,997,868.48
5. Step 5: Solve for x
   x = 1,997,868.48/1,632.72
6. Step 6: Final answer
   x = 1,223.64