Finding the Fourth Proportional to 1,338.83, 1,847.72 and 771.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.83 : 1,847.72 = 771.68 : x
2. Step 2: Convert to fraction form
   1,338.83/1,847.72 = 771.68/x
3. Step 3: Cross multiply
   1,338.83x = 1,847.72 × 771.68
4. Step 4: Simplify right side
   1,338.83x = 1,425,848.57
5. Step 5: Solve for x
   x = 1,425,848.57/1,338.83
6. Step 6: Final answer
   x = 1,065.00