Finding the Fourth Proportional to 2,666.16, 4,014.72 and 1,977.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.16 : 4,014.72 = 1,977.72 : x
2. Step 2: Convert to fraction form
   2,666.16/4,014.72 = 1,977.72/x
3. Step 3: Cross multiply
   2,666.16x = 4,014.72 × 1,977.72
4. Step 4: Simplify right side
   2,666.16x = 7,939,992.04
5. Step 5: Solve for x
   x = 7,939,992.04/2,666.16
6. Step 6: Final answer
   x = 2,978.06