Finding the Fourth Proportional to 1,921.32, 2,650.84 and 1,174.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.32 : 2,650.84 = 1,174.50 : x
2. Step 2: Convert to fraction form
   1,921.32/2,650.84 = 1,174.50/x
3. Step 3: Cross multiply
   1,921.32x = 2,650.84 × 1,174.50
4. Step 4: Simplify right side
   1,921.32x = 3,113,408.64
5. Step 5: Solve for x
   x = 3,113,408.64/1,921.32
6. Step 6: Final answer
   x = 1,620.45