Finding the Fourth Proportional to 1,262.01, 1,889.82 and 989.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.01 : 1,889.82 = 989.55 : x
2. Step 2: Convert to fraction form
   1,262.01/1,889.82 = 989.55/x
3. Step 3: Cross multiply
   1,262.01x = 1,889.82 × 989.55
4. Step 4: Simplify right side
   1,262.01x = 1,870,071.38
5. Step 5: Solve for x
   x = 1,870,071.38/1,262.01
6. Step 6: Final answer
   x = 1,481.82