Finding the Fourth Proportional to 1,061.58, 1,465.12 and 619.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.58 : 1,465.12 = 619.74 : x
2. Step 2: Convert to fraction form
   1,061.58/1,465.12 = 619.74/x
3. Step 3: Cross multiply
   1,061.58x = 1,465.12 × 619.74
4. Step 4: Simplify right side
   1,061.58x = 907,993.47
5. Step 5: Solve for x
   x = 907,993.47/1,061.58
6. Step 6: Final answer
   x = 855.32