Finding the Fourth Proportional to 3,528.42, 4,868.23 and 2,780.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,528.42 : 4,868.23 = 2,780.05 : x
2. Step 2: Convert to fraction form
   3,528.42/4,868.23 = 2,780.05/x
3. Step 3: Cross multiply
   3,528.42x = 4,868.23 × 2,780.05
4. Step 4: Simplify right side
   3,528.42x = 13,533,908.91
5. Step 5: Solve for x
   x = 13,533,908.91/3,528.42
6. Step 6: Final answer
   x = 3,835.69