Finding the Fourth Proportional to 1,067.80, 1,470.52 and 772.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.80 : 1,470.52 = 772.60 : x
2. Step 2: Convert to fraction form
   1,067.80/1,470.52 = 772.60/x
3. Step 3: Cross multiply
   1,067.80x = 1,470.52 × 772.60
4. Step 4: Simplify right side
   1,067.80x = 1,136,123.75
5. Step 5: Solve for x
   x = 1,136,123.75/1,067.80
6. Step 6: Final answer
   x = 1,063.99