Finding the Fourth Proportional to 2,160.45, 2,970.42 and 1,922.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.45 : 2,970.42 = 1,922.10 : x
2. Step 2: Convert to fraction form
   2,160.45/2,970.42 = 1,922.10/x
3. Step 3: Cross multiply
   2,160.45x = 2,970.42 × 1,922.10
4. Step 4: Simplify right side
   2,160.45x = 5,709,444.28
5. Step 5: Solve for x
   x = 5,709,444.28/2,160.45
6. Step 6: Final answer
   x = 2,642.71