Finding the Fourth Proportional to 2,156.91, 2,977.55 and 1,410.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.91 : 2,977.55 = 1,410.90 : x
2. Step 2: Convert to fraction form
   2,156.91/2,977.55 = 1,410.90/x
3. Step 3: Cross multiply
   2,156.91x = 2,977.55 × 1,410.90
4. Step 4: Simplify right side
   2,156.91x = 4,201,025.30
5. Step 5: Solve for x
   x = 4,201,025.30/2,156.91
6. Step 6: Final answer
   x = 1,947.71