Finding the Fourth Proportional to 2,666.94, 3,678.53 and 2,106.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.94 : 3,678.53 = 2,106.51 : x
2. Step 2: Convert to fraction form
   2,666.94/3,678.53 = 2,106.51/x
3. Step 3: Cross multiply
   2,666.94x = 3,678.53 × 2,106.51
4. Step 4: Simplify right side
   2,666.94x = 7,748,849.70
5. Step 5: Solve for x
   x = 7,748,849.70/2,666.94
6. Step 6: Final answer
   x = 2,905.52