Finding the Fourth Proportional to 1,607.86, 2,218.56 and 969.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.86 : 2,218.56 = 969.82 : x
2. Step 2: Convert to fraction form
   1,607.86/2,218.56 = 969.82/x
3. Step 3: Cross multiply
   1,607.86x = 2,218.56 × 969.82
4. Step 4: Simplify right side
   1,607.86x = 2,151,594.68
5. Step 5: Solve for x
   x = 2,151,594.68/1,607.86
6. Step 6: Final answer
   x = 1,338.17