Finding the Fourth Proportional to 1,061.70, 1,465.10 and 619.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.70 : 1,465.10 = 619.54 : x
2. Step 2: Convert to fraction form
   1,061.70/1,465.10 = 619.54/x
3. Step 3: Cross multiply
   1,061.70x = 1,465.10 × 619.54
4. Step 4: Simplify right side
   1,061.70x = 907,688.05
5. Step 5: Solve for x
   x = 907,688.05/1,061.70
6. Step 6: Final answer
   x = 854.94