Finding the Fourth Proportional to 2,108.78, 3,160.09 and 1,492.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.78 : 3,160.09 = 1,492.15 : x
2. Step 2: Convert to fraction form
   2,108.78/3,160.09 = 1,492.15/x
3. Step 3: Cross multiply
   2,108.78x = 3,160.09 × 1,492.15
4. Step 4: Simplify right side
   2,108.78x = 4,715,332.02
5. Step 5: Solve for x
   x = 4,715,332.02/2,108.78
6. Step 6: Final answer
   x = 2,236.05