Finding the Fourth Proportional to 1,262.48, 1,890.72 and 611.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262.48 : 1,890.72 = 611.12 : x
2. Step 2: Convert to fraction form
   1,262.48/1,890.72 = 611.12/x
3. Step 3: Cross multiply
   1,262.48x = 1,890.72 × 611.12
4. Step 4: Simplify right side
   1,262.48x = 1,155,456.81
5. Step 5: Solve for x
   x = 1,155,456.81/1,262.48
6. Step 6: Final answer
   x = 915.23