Finding the Fourth Proportional to 1,590.49, 2,194.50 and 1,030.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,590.49 : 2,194.50 = 1,030.78 : x
2. Step 2: Convert to fraction form
   1,590.49/2,194.50 = 1,030.78/x
3. Step 3: Cross multiply
   1,590.49x = 2,194.50 × 1,030.78
4. Step 4: Simplify right side
   1,590.49x = 2,262,046.71
5. Step 5: Solve for x
   x = 2,262,046.71/1,590.49
6. Step 6: Final answer
   x = 1,422.23