Finding the Fourth Proportional to 1,453.16, 2,178.61 and 722.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,453.16 : 2,178.61 = 722.17 : x
2. Step 2: Convert to fraction form
   1,453.16/2,178.61 = 722.17/x
3. Step 3: Cross multiply
   1,453.16x = 2,178.61 × 722.17
4. Step 4: Simplify right side
   1,453.16x = 1,573,326.78
5. Step 5: Solve for x
   x = 1,573,326.78/1,453.16
6. Step 6: Final answer
   x = 1,082.69