Finding the Fourth Proportional to 1,610.40, 2,411.28 and 1,061.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.40 : 2,411.28 = 1,061.12 : x
2. Step 2: Convert to fraction form
   1,610.40/2,411.28 = 1,061.12/x
3. Step 3: Cross multiply
   1,610.40x = 2,411.28 × 1,061.12
4. Step 4: Simplify right side
   1,610.40x = 2,558,657.43
5. Step 5: Solve for x
   x = 2,558,657.43/1,610.40
6. Step 6: Final answer
   x = 1,588.83