Finding the Fourth Proportional to 3,851.86, 5,770.72 and 3,436.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,851.86 : 5,770.72 = 3,436.78 : x
2. Step 2: Convert to fraction form
   3,851.86/5,770.72 = 3,436.78/x
3. Step 3: Cross multiply
   3,851.86x = 5,770.72 × 3,436.78
4. Step 4: Simplify right side
   3,851.86x = 19,832,695.08
5. Step 5: Solve for x
   x = 19,832,695.08/3,851.86
6. Step 6: Final answer
   x = 5,148.86