Finding the Fourth Proportional to 1,920.34, 2,873.21 and 1,188.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.34 : 2,873.21 = 1,188.10 : x
2. Step 2: Convert to fraction form
   1,920.34/2,873.21 = 1,188.10/x
3. Step 3: Cross multiply
   1,920.34x = 2,873.21 × 1,188.10
4. Step 4: Simplify right side
   1,920.34x = 3,413,646.43
5. Step 5: Solve for x
   x = 3,413,646.43/1,920.34
6. Step 6: Final answer
   x = 1,777.63