Finding the Fourth Proportional to 3,784.52, 5,677.43 and 1,320.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.52 : 5,677.43 = 1,320.84 : x
2. Step 2: Convert to fraction form
   3,784.52/5,677.43 = 1,320.84/x
3. Step 3: Cross multiply
   3,784.52x = 5,677.43 × 1,320.84
4. Step 4: Simplify right side
   3,784.52x = 7,498,970.04
5. Step 5: Solve for x
   x = 7,498,970.04/3,784.52
6. Step 6: Final answer
   x = 1,981.48