Finding the Fourth Proportional to 1,369.83, 1,890.29 and 772.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.83 : 1,890.29 = 772.34 : x
2. Step 2: Convert to fraction form
   1,369.83/1,890.29 = 772.34/x
3. Step 3: Cross multiply
   1,369.83x = 1,890.29 × 772.34
4. Step 4: Simplify right side
   1,369.83x = 1,459,934.71
5. Step 5: Solve for x
   x = 1,459,934.71/1,369.83
6. Step 6: Final answer
   x = 1,065.78