Finding the Fourth Proportional to 1,101.71, 1,520.37 and 659.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.71 : 1,520.37 = 659.63 : x
2. Step 2: Convert to fraction form
   1,101.71/1,520.37 = 659.63/x
3. Step 3: Cross multiply
   1,101.71x = 1,520.37 × 659.63
4. Step 4: Simplify right side
   1,101.71x = 1,002,874.06
5. Step 5: Solve for x
   x = 1,002,874.06/1,101.71
6. Step 6: Final answer
   x = 910.29