Finding the Fourth Proportional to 1,061.59, 1,465.16 and 619.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.59 : 1,465.16 = 619.75 : x
2. Step 2: Convert to fraction form
   1,061.59/1,465.16 = 619.75/x
3. Step 3: Cross multiply
   1,061.59x = 1,465.16 × 619.75
4. Step 4: Simplify right side
   1,061.59x = 908,032.91
5. Step 5: Solve for x
   x = 908,032.91/1,061.59
6. Step 6: Final answer
   x = 855.35