Finding the Fourth Proportional to 1,445.99, 1,996.11 and 886.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.99 : 1,996.11 = 886.55 : x
2. Step 2: Convert to fraction form
   1,445.99/1,996.11 = 886.55/x
3. Step 3: Cross multiply
   1,445.99x = 1,996.11 × 886.55
4. Step 4: Simplify right side
   1,445.99x = 1,769,641.34
5. Step 5: Solve for x
   x = 1,769,641.34/1,445.99
6. Step 6: Final answer
   x = 1,223.83