Finding the Fourth Proportional to 1,094.78, 1,510.38 and 721.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,094.78 : 1,510.38 = 721.94 : x
2. Step 2: Convert to fraction form
   1,094.78/1,510.38 = 721.94/x
3. Step 3: Cross multiply
   1,094.78x = 1,510.38 × 721.94
4. Step 4: Simplify right side
   1,094.78x = 1,090,403.74
5. Step 5: Solve for x
   x = 1,090,403.74/1,094.78
6. Step 6: Final answer
   x = 996.00