Finding the Fourth Proportional to 1,180.61, 1,776.83 and 889.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.61 : 1,776.83 = 889.62 : x
2. Step 2: Convert to fraction form
   1,180.61/1,776.83 = 889.62/x
3. Step 3: Cross multiply
   1,180.61x = 1,776.83 × 889.62
4. Step 4: Simplify right side
   1,180.61x = 1,580,699.06
5. Step 5: Solve for x
   x = 1,580,699.06/1,180.61
6. Step 6: Final answer
   x = 1,338.89