Finding the Fourth Proportional to 2,190.67, 3,279.99 and 1,531.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.67 : 3,279.99 = 1,531.15 : x
2. Step 2: Convert to fraction form
   2,190.67/3,279.99 = 1,531.15/x
3. Step 3: Cross multiply
   2,190.67x = 3,279.99 × 1,531.15
4. Step 4: Simplify right side
   2,190.67x = 5,022,156.69
5. Step 5: Solve for x
   x = 5,022,156.69/2,190.67
6. Step 6: Final answer
   x = 2,292.52