Finding the Fourth Proportional to 3,156.72, 4,354.56 and 1,977.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,156.72 : 4,354.56 = 1,977.56 : x
2. Step 2: Convert to fraction form
   3,156.72/4,354.56 = 1,977.56/x
3. Step 3: Cross multiply
   3,156.72x = 4,354.56 × 1,977.56
4. Step 4: Simplify right side
   3,156.72x = 8,611,403.67
5. Step 5: Solve for x
   x = 8,611,403.67/3,156.72
6. Step 6: Final answer
   x = 2,727.96