Finding the Fourth Proportional to 1,061.68, 1,465.09 and 619.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.68 : 1,465.09 = 619.62 : x
2. Step 2: Convert to fraction form
   1,061.68/1,465.09 = 619.62/x
3. Step 3: Cross multiply
   1,061.68x = 1,465.09 × 619.62
4. Step 4: Simplify right side
   1,061.68x = 907,799.07
5. Step 5: Solve for x
   x = 907,799.07/1,061.68
6. Step 6: Final answer
   x = 855.06