Finding the Fourth Proportional to 5,385.22, 7,426.59 and 3,494.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,385.22 : 7,426.59 = 3,494.78 : x
2. Step 2: Convert to fraction form
   5,385.22/7,426.59 = 3,494.78/x
3. Step 3: Cross multiply
   5,385.22x = 7,426.59 × 3,494.78
4. Step 4: Simplify right side
   5,385.22x = 25,954,275.81
5. Step 5: Solve for x
   x = 25,954,275.81/5,385.22
6. Step 6: Final answer
   x = 4,819.54