Finding the Fourth Proportional to 1,290.03, 1,780.29 and 730.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.03 : 1,780.29 = 730.52 : x
2. Step 2: Convert to fraction form
   1,290.03/1,780.29 = 730.52/x
3. Step 3: Cross multiply
   1,290.03x = 1,780.29 × 730.52
4. Step 4: Simplify right side
   1,290.03x = 1,300,541.90
5. Step 5: Solve for x
   x = 1,300,541.90/1,290.03
6. Step 6: Final answer
   x = 1,008.15