Finding the Fourth Proportional to 1,061.87, 1,465.49 and 619.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.87 : 1,465.49 = 619.88 : x
2. Step 2: Convert to fraction form
   1,061.87/1,465.49 = 619.88/x
3. Step 3: Cross multiply
   1,061.87x = 1,465.49 × 619.88
4. Step 4: Simplify right side
   1,061.87x = 908,422.16
5. Step 5: Solve for x
   x = 908,422.16/1,061.87
6. Step 6: Final answer
   x = 855.50