Finding the Fourth Proportional to 2,085.48, 3,128.26 and 546.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.48 : 3,128.26 = 546.52 : x
2. Step 2: Convert to fraction form
   2,085.48/3,128.26 = 546.52/x
3. Step 3: Cross multiply
   2,085.48x = 3,128.26 × 546.52
4. Step 4: Simplify right side
   2,085.48x = 1,709,656.66
5. Step 5: Solve for x
   x = 1,709,656.66/2,085.48
6. Step 6: Final answer
   x = 819.79