Finding the Fourth Proportional to 1,061.77, 1,465.24 and 619.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.77 : 1,465.24 = 619.75 : x
2. Step 2: Convert to fraction form
   1,061.77/1,465.24 = 619.75/x
3. Step 3: Cross multiply
   1,061.77x = 1,465.24 × 619.75
4. Step 4: Simplify right side
   1,061.77x = 908,077.28
5. Step 5: Solve for x
   x = 908,077.28/1,061.77
6. Step 6: Final answer
   x = 855.25