Finding the Fourth Proportional to 1,459.37, 2,174.31 and 1,389.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,459.37 : 2,174.31 = 1,389.71 : x
2. Step 2: Convert to fraction form
   1,459.37/2,174.31 = 1,389.71/x
3. Step 3: Cross multiply
   1,459.37x = 2,174.31 × 1,389.71
4. Step 4: Simplify right side
   1,459.37x = 3,021,665.79
5. Step 5: Solve for x
   x = 3,021,665.79/1,459.37
6. Step 6: Final answer
   x = 2,070.52