Finding the Fourth Proportional to 1,068.17, 1,472.73 and 718.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.17 : 1,472.73 = 718.25 : x
2. Step 2: Convert to fraction form
   1,068.17/1,472.73 = 718.25/x
3. Step 3: Cross multiply
   1,068.17x = 1,472.73 × 718.25
4. Step 4: Simplify right side
   1,068.17x = 1,057,788.32
5. Step 5: Solve for x
   x = 1,057,788.32/1,068.17
6. Step 6: Final answer
   x = 990.28