Finding the Fourth Proportional to 1,012.63, 1,398.17 and 659.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.63 : 1,398.17 = 659.07 : x
2. Step 2: Convert to fraction form
   1,012.63/1,398.17 = 659.07/x
3. Step 3: Cross multiply
   1,012.63x = 1,398.17 × 659.07
4. Step 4: Simplify right side
   1,012.63x = 921,491.90
5. Step 5: Solve for x
   x = 921,491.90/1,012.63
6. Step 6: Final answer
   x = 910.00