Finding the Fourth Proportional to 2,909.78, 4,331.76 and 2,892.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,909.78 : 4,331.76 = 2,892.49 : x
2. Step 2: Convert to fraction form
   2,909.78/4,331.76 = 2,892.49/x
3. Step 3: Cross multiply
   2,909.78x = 4,331.76 × 2,892.49
4. Step 4: Simplify right side
   2,909.78x = 12,529,550.82
5. Step 5: Solve for x
   x = 12,529,550.82/2,909.78
6. Step 6: Final answer
   x = 4,306.01