Finding the Fourth Proportional to 1,209.38, 1,663.47 and 1,061.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.38 : 1,663.47 = 1,061.82 : x
2. Step 2: Convert to fraction form
   1,209.38/1,663.47 = 1,061.82/x
3. Step 3: Cross multiply
   1,209.38x = 1,663.47 × 1,061.82
4. Step 4: Simplify right side
   1,209.38x = 1,766,305.72
5. Step 5: Solve for x
   x = 1,766,305.72/1,209.38
6. Step 6: Final answer
   x = 1,460.51