Finding the Fourth Proportional to 2,015.37, 2,792.40 and 1,971.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.37 : 2,792.40 = 1,971.63 : x
2. Step 2: Convert to fraction form
   2,015.37/2,792.40 = 1,971.63/x
3. Step 3: Cross multiply
   2,015.37x = 2,792.40 × 1,971.63
4. Step 4: Simplify right side
   2,015.37x = 5,505,579.61
5. Step 5: Solve for x
   x = 5,505,579.61/2,015.37
6. Step 6: Final answer
   x = 2,731.80