Finding the Fourth Proportional to 2,490.72, 3,437.64 and 1,558.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.72 : 3,437.64 = 1,558.68 : x
2. Step 2: Convert to fraction form
   2,490.72/3,437.64 = 1,558.68/x
3. Step 3: Cross multiply
   2,490.72x = 3,437.64 × 1,558.68
4. Step 4: Simplify right side
   2,490.72x = 5,358,180.72
5. Step 5: Solve for x
   x = 5,358,180.72/2,490.72
6. Step 6: Final answer
   x = 2,151.26