Finding the Fourth Proportional to 1,630.52, 2,247.18 and 1,187.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,630.52 : 2,247.18 = 1,187.72 : x
2. Step 2: Convert to fraction form
   1,630.52/2,247.18 = 1,187.72/x
3. Step 3: Cross multiply
   1,630.52x = 2,247.18 × 1,187.72
4. Step 4: Simplify right side
   1,630.52x = 2,669,020.63
5. Step 5: Solve for x
   x = 2,669,020.63/1,630.52
6. Step 6: Final answer
   x = 1,636.91