Finding the Fourth Proportional to 2,167.76, 2,990.43 and 1,372.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.76 : 2,990.43 = 1,372.10 : x
2. Step 2: Convert to fraction form
   2,167.76/2,990.43 = 1,372.10/x
3. Step 3: Cross multiply
   2,167.76x = 2,990.43 × 1,372.10
4. Step 4: Simplify right side
   2,167.76x = 4,103,169.00
5. Step 5: Solve for x
   x = 4,103,169.00/2,167.76
6. Step 6: Final answer
   x = 1,892.82