Finding the Fourth Proportional to 3,486.01, 5,227.50 and 1,020.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,486.01 : 5,227.50 = 1,020.78 : x
2. Step 2: Convert to fraction form
   3,486.01/5,227.50 = 1,020.78/x
3. Step 3: Cross multiply
   3,486.01x = 5,227.50 × 1,020.78
4. Step 4: Simplify right side
   3,486.01x = 5,336,127.45
5. Step 5: Solve for x
   x = 5,336,127.45/3,486.01
6. Step 6: Final answer
   x = 1,530.73