Finding the Fourth Proportional to 1,061.69, 1,465.05 and 619.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.69 : 1,465.05 = 619.55 : x
2. Step 2: Convert to fraction form
   1,061.69/1,465.05 = 619.55/x
3. Step 3: Cross multiply
   1,061.69x = 1,465.05 × 619.55
4. Step 4: Simplify right side
   1,061.69x = 907,671.73
5. Step 5: Solve for x
   x = 907,671.73/1,061.69
6. Step 6: Final answer
   x = 854.93