Finding the Fourth Proportional to 1,412.42, 1,948.48 and 915.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.42 : 1,948.48 = 915.22 : x
2. Step 2: Convert to fraction form
   1,412.42/1,948.48 = 915.22/x
3. Step 3: Cross multiply
   1,412.42x = 1,948.48 × 915.22
4. Step 4: Simplify right side
   1,412.42x = 1,783,287.87
5. Step 5: Solve for x
   x = 1,783,287.87/1,412.42
6. Step 6: Final answer
   x = 1,262.58