Finding the Fourth Proportional to 1,530.59, 2,111.91 and 1,057.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.59 : 2,111.91 = 1,057.75 : x
2. Step 2: Convert to fraction form
   1,530.59/2,111.91 = 1,057.75/x
3. Step 3: Cross multiply
   1,530.59x = 2,111.91 × 1,057.75
4. Step 4: Simplify right side
   1,530.59x = 2,233,872.48
5. Step 5: Solve for x
   x = 2,233,872.48/1,530.59
6. Step 6: Final answer
   x = 1,459.49