Finding the Fourth Proportional to 1,377.69, 2,065.63 and 784.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.69 : 2,065.63 = 784.73 : x
2. Step 2: Convert to fraction form
   1,377.69/2,065.63 = 784.73/x
3. Step 3: Cross multiply
   1,377.69x = 2,065.63 × 784.73
4. Step 4: Simplify right side
   1,377.69x = 1,620,961.83
5. Step 5: Solve for x
   x = 1,620,961.83/1,377.69
6. Step 6: Final answer
   x = 1,176.58