Finding the Fourth Proportional to 1,781.39, 2,672.00 and 1,055.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.39 : 2,672.00 = 1,055.58 : x
2. Step 2: Convert to fraction form
   1,781.39/2,672.00 = 1,055.58/x
3. Step 3: Cross multiply
   1,781.39x = 2,672.00 × 1,055.58
4. Step 4: Simplify right side
   1,781.39x = 2,820,504.48
5. Step 5: Solve for x
   x = 2,820,504.48/1,781.39
6. Step 6: Final answer
   x = 1,583.32