Finding the Fourth Proportional to 1,977.59, 2,728.68 and 1,191.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.59 : 2,728.68 = 1,191.69 : x
2. Step 2: Convert to fraction form
   1,977.59/2,728.68 = 1,191.69/x
3. Step 3: Cross multiply
   1,977.59x = 2,728.68 × 1,191.69
4. Step 4: Simplify right side
   1,977.59x = 3,251,740.67
5. Step 5: Solve for x
   x = 3,251,740.67/1,977.59
6. Step 6: Final answer
   x = 1,644.29