Finding the Fourth Proportional to 2,155.89, 2,972.12 and 1,822.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.89 : 2,972.12 = 1,822.98 : x
2. Step 2: Convert to fraction form
   2,155.89/2,972.12 = 1,822.98/x
3. Step 3: Cross multiply
   2,155.89x = 2,972.12 × 1,822.98
4. Step 4: Simplify right side
   2,155.89x = 5,418,106.20
5. Step 5: Solve for x
   x = 5,418,106.20/2,155.89
6. Step 6: Final answer
   x = 2,513.16