Finding the Fourth Proportional to 2,389.70, 3,298.05 and 1,395.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.70 : 3,298.05 = 1,395.22 : x
2. Step 2: Convert to fraction form
   2,389.70/3,298.05 = 1,395.22/x
3. Step 3: Cross multiply
   2,389.70x = 3,298.05 × 1,395.22
4. Step 4: Simplify right side
   2,389.70x = 4,601,505.32
5. Step 5: Solve for x
   x = 4,601,505.32/2,389.70
6. Step 6: Final answer
   x = 1,925.56