Finding the Fourth Proportional to 1,061.45, 1,465.05 and 619.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.45 : 1,465.05 = 619.43 : x
2. Step 2: Convert to fraction form
   1,061.45/1,465.05 = 619.43/x
3. Step 3: Cross multiply
   1,061.45x = 1,465.05 × 619.43
4. Step 4: Simplify right side
   1,061.45x = 907,495.92
5. Step 5: Solve for x
   x = 907,495.92/1,061.45
6. Step 6: Final answer
   x = 854.96