Finding the Fourth Proportional to 1,128.02, 1,684.04 and 1,010.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.02 : 1,684.04 = 1,010.57 : x
2. Step 2: Convert to fraction form
   1,128.02/1,684.04 = 1,010.57/x
3. Step 3: Cross multiply
   1,128.02x = 1,684.04 × 1,010.57
4. Step 4: Simplify right side
   1,128.02x = 1,701,834.41
5. Step 5: Solve for x
   x = 1,701,834.41/1,128.02
6. Step 6: Final answer
   x = 1,508.70