Finding the Fourth Proportional to 2,663.11, 3,986.83 and 1,972.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.11 : 3,986.83 = 1,972.86 : x
2. Step 2: Convert to fraction form
   2,663.11/3,986.83 = 1,972.86/x
3. Step 3: Cross multiply
   2,663.11x = 3,986.83 × 1,972.86
4. Step 4: Simplify right side
   2,663.11x = 7,865,457.43
5. Step 5: Solve for x
   x = 7,865,457.43/2,663.11
6. Step 6: Final answer
   x = 2,953.49