Finding the Fourth Proportional to 1,618.47, 2,426.10 and 839.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.47 : 2,426.10 = 839.34 : x
2. Step 2: Convert to fraction form
   1,618.47/2,426.10 = 839.34/x
3. Step 3: Cross multiply
   1,618.47x = 2,426.10 × 839.34
4. Step 4: Simplify right side
   1,618.47x = 2,036,322.77
5. Step 5: Solve for x
   x = 2,036,322.77/1,618.47
6. Step 6: Final answer
   x = 1,258.18