Finding the Fourth Proportional to 3,807.30, 5,712.03 and 3,528.66

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807.30 : 5,712.03 = 3,528.66 : x
2. Step 2: Convert to fraction form
   3,807.30/5,712.03 = 3,528.66/x
3. Step 3: Cross multiply
   3,807.30x = 5,712.03 × 3,528.66
4. Step 4: Simplify right side
   3,807.30x = 20,155,811.78
5. Step 5: Solve for x
   x = 20,155,811.78/3,807.30
6. Step 6: Final answer
   x = 5,293.99