Finding the Fourth Proportional to 3,692.89, 5,539.89 and 1,320.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,692.89 : 5,539.89 = 1,320.79 : x
2. Step 2: Convert to fraction form
   3,692.89/5,539.89 = 1,320.79/x
3. Step 3: Cross multiply
   3,692.89x = 5,539.89 × 1,320.79
4. Step 4: Simplify right side
   3,692.89x = 7,317,031.31
5. Step 5: Solve for x
   x = 7,317,031.31/3,692.89
6. Step 6: Final answer
   x = 1,981.38