Finding the Fourth Proportional to 1,445.55, 1,995.05 and 816.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.55 : 1,995.05 = 816.12 : x
2. Step 2: Convert to fraction form
   1,445.55/1,995.05 = 816.12/x
3. Step 3: Cross multiply
   1,445.55x = 1,995.05 × 816.12
4. Step 4: Simplify right side
   1,445.55x = 1,628,196.13
5. Step 5: Solve for x
   x = 1,628,196.13/1,445.55
6. Step 6: Final answer
   x = 1,126.35