Finding the Fourth Proportional to 2,645.59, 3,969.47 and 914.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.59 : 3,969.47 = 914.35 : x
2. Step 2: Convert to fraction form
   2,645.59/3,969.47 = 914.35/x
3. Step 3: Cross multiply
   2,645.59x = 3,969.47 × 914.35
4. Step 4: Simplify right side
   2,645.59x = 3,629,484.89
5. Step 5: Solve for x
   x = 3,629,484.89/2,645.59
6. Step 6: Final answer
   x = 1,371.90