Finding the Fourth Proportional to 1,703.39, 2,551.49 and 779.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,703.39 : 2,551.49 = 779.72 : x
2. Step 2: Convert to fraction form
   1,703.39/2,551.49 = 779.72/x
3. Step 3: Cross multiply
   1,703.39x = 2,551.49 × 779.72
4. Step 4: Simplify right side
   1,703.39x = 1,989,443.88
5. Step 5: Solve for x
   x = 1,989,443.88/1,703.39
6. Step 6: Final answer
   x = 1,167.93