Finding the Fourth Proportional to 1,780.03, 2,672.32 and 1,122.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.03 : 2,672.32 = 1,122.10 : x
2. Step 2: Convert to fraction form
   1,780.03/2,672.32 = 1,122.10/x
3. Step 3: Cross multiply
   1,780.03x = 2,672.32 × 1,122.10
4. Step 4: Simplify right side
   1,780.03x = 2,998,610.27
5. Step 5: Solve for x
   x = 2,998,610.27/1,780.03
6. Step 6: Final answer
   x = 1,684.58