Finding the Fourth Proportional to 1,280.37, 1,915.56 and 973.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.37 : 1,915.56 = 973.11 : x
2. Step 2: Convert to fraction form
   1,280.37/1,915.56 = 973.11/x
3. Step 3: Cross multiply
   1,280.37x = 1,915.56 × 973.11
4. Step 4: Simplify right side
   1,280.37x = 1,864,050.59
5. Step 5: Solve for x
   x = 1,864,050.59/1,280.37
6. Step 6: Final answer
   x = 1,455.87