Finding the Fourth Proportional to 2,095.79, 2,892.31 and 1,211.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,095.79 : 2,892.31 = 1,211.90 : x
2. Step 2: Convert to fraction form
   2,095.79/2,892.31 = 1,211.90/x
3. Step 3: Cross multiply
   2,095.79x = 2,892.31 × 1,211.90
4. Step 4: Simplify right side
   2,095.79x = 3,505,173.00
5. Step 5: Solve for x
   x = 3,505,173.00/2,095.79
6. Step 6: Final answer
   x = 1,672.49