Finding the Fourth Proportional to 1,279.37, 1,915.38 and 1,145.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.37 : 1,915.38 = 1,145.82 : x
2. Step 2: Convert to fraction form
   1,279.37/1,915.38 = 1,145.82/x
3. Step 3: Cross multiply
   1,279.37x = 1,915.38 × 1,145.82
4. Step 4: Simplify right side
   1,279.37x = 2,194,677.83
5. Step 5: Solve for x
   x = 2,194,677.83/1,279.37
6. Step 6: Final answer
   x = 1,715.43