Finding the Fourth Proportional to 1,372.01, 1,893.06 and 812.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.01 : 1,893.06 = 812.09 : x
2. Step 2: Convert to fraction form
   1,372.01/1,893.06 = 812.09/x
3. Step 3: Cross multiply
   1,372.01x = 1,893.06 × 812.09
4. Step 4: Simplify right side
   1,372.01x = 1,537,335.10
5. Step 5: Solve for x
   x = 1,537,335.10/1,372.01
6. Step 6: Final answer
   x = 1,120.50