Finding the Fourth Proportional to 3,875.94, 5,780.07 and 3,613.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,875.94 : 5,780.07 = 3,613.50 : x
2. Step 2: Convert to fraction form
   3,875.94/5,780.07 = 3,613.50/x
3. Step 3: Cross multiply
   3,875.94x = 5,780.07 × 3,613.50
4. Step 4: Simplify right side
   3,875.94x = 20,886,282.95
5. Step 5: Solve for x
   x = 20,886,282.95/3,875.94
6. Step 6: Final answer
   x = 5,388.70