Finding the Fourth Proportional to 1,061.88, 1,465.17 and 619.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.88 : 1,465.17 = 619.53 : x
2. Step 2: Convert to fraction form
   1,061.88/1,465.17 = 619.53/x
3. Step 3: Cross multiply
   1,061.88x = 1,465.17 × 619.53
4. Step 4: Simplify right side
   1,061.88x = 907,716.77
5. Step 5: Solve for x
   x = 907,716.77/1,061.88
6. Step 6: Final answer
   x = 854.82