Finding the Fourth Proportional to 1,559.72, 2,156.52 and 1,490.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.72 : 2,156.52 = 1,490.87 : x
2. Step 2: Convert to fraction form
   1,559.72/2,156.52 = 1,490.87/x
3. Step 3: Cross multiply
   1,559.72x = 2,156.52 × 1,490.87
4. Step 4: Simplify right side
   1,559.72x = 3,215,080.19
5. Step 5: Solve for x
   x = 3,215,080.19/1,559.72
6. Step 6: Final answer
   x = 2,061.33