Finding the Fourth Proportional to 2,981.81, 4,116.54 and 2,666.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.81 : 4,116.54 = 2,666.31 : x
2. Step 2: Convert to fraction form
   2,981.81/4,116.54 = 2,666.31/x
3. Step 3: Cross multiply
   2,981.81x = 4,116.54 × 2,666.31
4. Step 4: Simplify right side
   2,981.81x = 10,975,971.77
5. Step 5: Solve for x
   x = 10,975,971.77/2,981.81
6. Step 6: Final answer
   x = 3,680.98