Finding the Fourth Proportional to 1,085.91, 1,625.76 and 719.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.91 : 1,625.76 = 719.97 : x
2. Step 2: Convert to fraction form
   1,085.91/1,625.76 = 719.97/x
3. Step 3: Cross multiply
   1,085.91x = 1,625.76 × 719.97
4. Step 4: Simplify right side
   1,085.91x = 1,170,498.43
5. Step 5: Solve for x
   x = 1,170,498.43/1,085.91
6. Step 6: Final answer
   x = 1,077.90