Finding the Fourth Proportional to 2,279.89, 3,416.59 and 1,126.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.89 : 3,416.59 = 1,126.45 : x
2. Step 2: Convert to fraction form
   2,279.89/3,416.59 = 1,126.45/x
3. Step 3: Cross multiply
   2,279.89x = 3,416.59 × 1,126.45
4. Step 4: Simplify right side
   2,279.89x = 3,848,617.81
5. Step 5: Solve for x
   x = 3,848,617.81/2,279.89
6. Step 6: Final answer
   x = 1,688.07