Finding the Fourth Proportional to 1,395.72, 2,090.34 and 1,347.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.72 : 2,090.34 = 1,347.12 : x
2. Step 2: Convert to fraction form
   1,395.72/2,090.34 = 1,347.12/x
3. Step 3: Cross multiply
   1,395.72x = 2,090.34 × 1,347.12
4. Step 4: Simplify right side
   1,395.72x = 2,815,938.82
5. Step 5: Solve for x
   x = 2,815,938.82/1,395.72
6. Step 6: Final answer
   x = 2,017.55