Finding the Fourth Proportional to 1,412.20, 1,948.14 and 915.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.20 : 1,948.14 = 915.27 : x
2. Step 2: Convert to fraction form
   1,412.20/1,948.14 = 915.27/x
3. Step 3: Cross multiply
   1,412.20x = 1,948.14 × 915.27
4. Step 4: Simplify right side
   1,412.20x = 1,783,074.10
5. Step 5: Solve for x
   x = 1,783,074.10/1,412.20
6. Step 6: Final answer
   x = 1,262.62