Finding the Fourth Proportional to 1,068.78, 1,474.52 and 719.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.78 : 1,474.52 = 719.70 : x
2. Step 2: Convert to fraction form
   1,068.78/1,474.52 = 719.70/x
3. Step 3: Cross multiply
   1,068.78x = 1,474.52 × 719.70
4. Step 4: Simplify right side
   1,068.78x = 1,061,212.04
5. Step 5: Solve for x
   x = 1,061,212.04/1,068.78
6. Step 6: Final answer
   x = 992.92