Finding the Fourth Proportional to 2,642.10, 3,956.67 and 1,773.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.10 : 3,956.67 = 1,773.78 : x
2. Step 2: Convert to fraction form
   2,642.10/3,956.67 = 1,773.78/x
3. Step 3: Cross multiply
   2,642.10x = 3,956.67 × 1,773.78
4. Step 4: Simplify right side
   2,642.10x = 7,018,262.11
5. Step 5: Solve for x
   x = 7,018,262.11/2,642.10
6. Step 6: Final answer
   x = 2,656.32