Finding the Fourth Proportional to 2,058.39, 2,841.20 and 1,781.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058.39 : 2,841.20 = 1,781.60 : x
2. Step 2: Convert to fraction form
   2,058.39/2,841.20 = 1,781.60/x
3. Step 3: Cross multiply
   2,058.39x = 2,841.20 × 1,781.60
4. Step 4: Simplify right side
   2,058.39x = 5,061,858.81
5. Step 5: Solve for x
   x = 5,061,858.81/2,058.39
6. Step 6: Final answer
   x = 2,459.13