Finding the Fourth Proportional to 2,666.56, 3,997.12 and 933.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.56 : 3,997.12 = 933.76 : x
2. Step 2: Convert to fraction form
   2,666.56/3,997.12 = 933.76/x
3. Step 3: Cross multiply
   2,666.56x = 3,997.12 × 933.76
4. Step 4: Simplify right side
   2,666.56x = 3,732,350.77
5. Step 5: Solve for x
   x = 3,732,350.77/2,666.56
6. Step 6: Final answer
   x = 1,399.69