Finding the Fourth Proportional to 1,056.31, 1,584.06 and 730.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.31 : 1,584.06 = 730.69 : x
2. Step 2: Convert to fraction form
   1,056.31/1,584.06 = 730.69/x
3. Step 3: Cross multiply
   1,056.31x = 1,584.06 × 730.69
4. Step 4: Simplify right side
   1,056.31x = 1,157,456.80
5. Step 5: Solve for x
   x = 1,157,456.80/1,056.31
6. Step 6: Final answer
   x = 1,095.75