Finding the Fourth Proportional to 1,527.71, 2,105.09 and 1,173.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.71 : 2,105.09 = 1,173.61 : x
2. Step 2: Convert to fraction form
   1,527.71/2,105.09 = 1,173.61/x
3. Step 3: Cross multiply
   1,527.71x = 2,105.09 × 1,173.61
4. Step 4: Simplify right side
   1,527.71x = 2,470,561.76
5. Step 5: Solve for x
   x = 2,470,561.76/1,527.71
6. Step 6: Final answer
   x = 1,617.17