Finding the Fourth Proportional to 1,279.41, 1,915.37 and 972.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.41 : 1,915.37 = 972.49 : x
2. Step 2: Convert to fraction form
   1,279.41/1,915.37 = 972.49/x
3. Step 3: Cross multiply
   1,279.41x = 1,915.37 × 972.49
4. Step 4: Simplify right side
   1,279.41x = 1,862,663.73
5. Step 5: Solve for x
   x = 1,862,663.73/1,279.41
6. Step 6: Final answer
   x = 1,455.88