Finding the Fourth Proportional to 1,061.85, 1,465.41 and 620.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.85 : 1,465.41 = 620.01 : x
2. Step 2: Convert to fraction form
   1,061.85/1,465.41 = 620.01/x
3. Step 3: Cross multiply
   1,061.85x = 1,465.41 × 620.01
4. Step 4: Simplify right side
   1,061.85x = 908,568.85
5. Step 5: Solve for x
   x = 908,568.85/1,061.85
6. Step 6: Final answer
   x = 855.65