Finding the Fourth Proportional to 1,363.72, 1,881.48 and 866.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.72 : 1,881.48 = 866.48 : x
2. Step 2: Convert to fraction form
   1,363.72/1,881.48 = 866.48/x
3. Step 3: Cross multiply
   1,363.72x = 1,881.48 × 866.48
4. Step 4: Simplify right side
   1,363.72x = 1,630,264.34
5. Step 5: Solve for x
   x = 1,630,264.34/1,363.72
6. Step 6: Final answer
   x = 1,195.45