Finding the Fourth Proportional to 1,920.58, 2,650.46 and 1,174.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.58 : 2,650.46 = 1,174.86 : x
2. Step 2: Convert to fraction form
   1,920.58/2,650.46 = 1,174.86/x
3. Step 3: Cross multiply
   1,920.58x = 2,650.46 × 1,174.86
4. Step 4: Simplify right side
   1,920.58x = 3,113,913.56
5. Step 5: Solve for x
   x = 3,113,913.56/1,920.58
6. Step 6: Final answer
   x = 1,621.34