Finding the Fourth Proportional to 1,816.30, 2,507.70 and 1,395.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.30 : 2,507.70 = 1,395.89 : x
2. Step 2: Convert to fraction form
   1,816.30/2,507.70 = 1,395.89/x
3. Step 3: Cross multiply
   1,816.30x = 2,507.70 × 1,395.89
4. Step 4: Simplify right side
   1,816.30x = 3,500,466.37
5. Step 5: Solve for x
   x = 3,500,466.37/1,816.30
6. Step 6: Final answer
   x = 1,927.25