Finding the Fourth Proportional to 1,606.53, 2,216.73 and 976.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.53 : 2,216.73 = 976.86 : x
2. Step 2: Convert to fraction form
   1,606.53/2,216.73 = 976.86/x
3. Step 3: Cross multiply
   1,606.53x = 2,216.73 × 976.86
4. Step 4: Simplify right side
   1,606.53x = 2,165,434.41
5. Step 5: Solve for x
   x = 2,165,434.41/1,606.53
6. Step 6: Final answer
   x = 1,347.89