Finding the Fourth Proportional to 1,065.79, 1,595.31 and 772.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.79 : 1,595.31 = 772.30 : x
2. Step 2: Convert to fraction form
   1,065.79/1,595.31 = 772.30/x
3. Step 3: Cross multiply
   1,065.79x = 1,595.31 × 772.30
4. Step 4: Simplify right side
   1,065.79x = 1,232,057.91
5. Step 5: Solve for x
   x = 1,232,057.91/1,065.79
6. Step 6: Final answer
   x = 1,156.00