Finding the Fourth Proportional to 2,192.42, 3,026.06 and 1,308.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,192.42 : 3,026.06 = 1,308.78 : x
2. Step 2: Convert to fraction form
   2,192.42/3,026.06 = 1,308.78/x
3. Step 3: Cross multiply
   2,192.42x = 3,026.06 × 1,308.78
4. Step 4: Simplify right side
   2,192.42x = 3,960,446.81
5. Step 5: Solve for x
   x = 3,960,446.81/2,192.42
6. Step 6: Final answer
   x = 1,806.43