Finding the Fourth Proportional to 1,182.37, 1,631.61 and 902.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.37 : 1,631.61 = 902.80 : x
2. Step 2: Convert to fraction form
   1,182.37/1,631.61 = 902.80/x
3. Step 3: Cross multiply
   1,182.37x = 1,631.61 × 902.80
4. Step 4: Simplify right side
   1,182.37x = 1,473,017.51
5. Step 5: Solve for x
   x = 1,473,017.51/1,182.37
6. Step 6: Final answer
   x = 1,245.82