Finding the Fourth Proportional to 766.52, 1,055.59 and 719.61

Step by Step Solution

1. Step 1: Write the proportion equation
   766.52 : 1,055.59 = 719.61 : x
2. Step 2: Convert to fraction form
   766.52/1,055.59 = 719.61/x
3. Step 3: Cross multiply
   766.52x = 1,055.59 × 719.61
4. Step 4: Simplify right side
   766.52x = 759,613.12
5. Step 5: Solve for x
   x = 759,613.12/766.52
6. Step 6: Final answer
   x = 990.99