Finding the Fourth Proportional to 1,512.47, 2,085.83 and 980.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,512.47 : 2,085.83 = 980.80 : x
2. Step 2: Convert to fraction form
   1,512.47/2,085.83 = 980.80/x
3. Step 3: Cross multiply
   1,512.47x = 2,085.83 × 980.80
4. Step 4: Simplify right side
   1,512.47x = 2,045,778.73
5. Step 5: Solve for x
   x = 2,045,778.73/1,512.47
6. Step 6: Final answer
   x = 1,352.61