Finding the Fourth Proportional to 1,133.76, 1,689.98 and 1,009.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,133.76 : 1,689.98 = 1,009.72 : x
2. Step 2: Convert to fraction form
   1,133.76/1,689.98 = 1,009.72/x
3. Step 3: Cross multiply
   1,133.76x = 1,689.98 × 1,009.72
4. Step 4: Simplify right side
   1,133.76x = 1,706,406.61
5. Step 5: Solve for x
   x = 1,706,406.61/1,133.76
6. Step 6: Final answer
   x = 1,505.09