Finding the Fourth Proportional to 2,885.59, 3,953.27 and 2,777.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.59 : 3,953.27 = 2,777.60 : x
2. Step 2: Convert to fraction form
   2,885.59/3,953.27 = 2,777.60/x
3. Step 3: Cross multiply
   2,885.59x = 3,953.27 × 2,777.60
4. Step 4: Simplify right side
   2,885.59x = 10,980,602.75
5. Step 5: Solve for x
   x = 10,980,602.75/2,885.59
6. Step 6: Final answer
   x = 3,805.32