Finding the Fourth Proportional to 2,666.84, 3,674.34 and 1,991.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.84 : 3,674.34 = 1,991.72 : x
2. Step 2: Convert to fraction form
   2,666.84/3,674.34 = 1,991.72/x
3. Step 3: Cross multiply
   2,666.84x = 3,674.34 × 1,991.72
4. Step 4: Simplify right side
   2,666.84x = 7,318,256.46
5. Step 5: Solve for x
   x = 7,318,256.46/2,666.84
6. Step 6: Final answer
   x = 2,744.17