Finding the Fourth Proportional to 1,978.39, 2,730.17 and 1,192.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.39 : 2,730.17 = 1,192.58 : x
2. Step 2: Convert to fraction form
   1,978.39/2,730.17 = 1,192.58/x
3. Step 3: Cross multiply
   1,978.39x = 2,730.17 × 1,192.58
4. Step 4: Simplify right side
   1,978.39x = 3,255,961.06
5. Step 5: Solve for x
   x = 3,255,961.06/1,978.39
6. Step 6: Final answer
   x = 1,645.77