Finding the Fourth Proportional to 1,084.05, 1,614.53 and 1,045.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.05 : 1,614.53 = 1,045.78 : x
2. Step 2: Convert to fraction form
   1,084.05/1,614.53 = 1,045.78/x
3. Step 3: Cross multiply
   1,084.05x = 1,614.53 × 1,045.78
4. Step 4: Simplify right side
   1,084.05x = 1,688,441.76
5. Step 5: Solve for x
   x = 1,688,441.76/1,084.05
6. Step 6: Final answer
   x = 1,557.53