Finding the Fourth Proportional to 1,072.67, 1,480.61 and 653.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.67 : 1,480.61 = 653.40 : x
2. Step 2: Convert to fraction form
   1,072.67/1,480.61 = 653.40/x
3. Step 3: Cross multiply
   1,072.67x = 1,480.61 × 653.40
4. Step 4: Simplify right side
   1,072.67x = 967,427.31
5. Step 5: Solve for x
   x = 967,427.31/1,072.67
6. Step 6: Final answer
   x = 901.89