Finding the Fourth Proportional to 1,559.16, 2,155.68 and 1,490.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.16 : 2,155.68 = 1,490.31 : x
2. Step 2: Convert to fraction form
   1,559.16/2,155.68 = 1,490.31/x
3. Step 3: Cross multiply
   1,559.16x = 2,155.68 × 1,490.31
4. Step 4: Simplify right side
   1,559.16x = 3,212,631.46
5. Step 5: Solve for x
   x = 3,212,631.46/1,559.16
6. Step 6: Final answer
   x = 2,060.49