Finding the Fourth Proportional to 1,493.10, 2,242.05 and 1,128.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.10 : 2,242.05 = 1,128.30 : x
2. Step 2: Convert to fraction form
   1,493.10/2,242.05 = 1,128.30/x
3. Step 3: Cross multiply
   1,493.10x = 2,242.05 × 1,128.30
4. Step 4: Simplify right side
   1,493.10x = 2,529,705.02
5. Step 5: Solve for x
   x = 2,529,705.02/1,493.10
6. Step 6: Final answer
   x = 1,694.26