Finding the Fourth Proportional to 1,510.40, 2,116 and 1,510.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.40 : 2,116 = 1,510.40 : x
2. Step 2: Convert to fraction form
   1,510.40/2,116 = 1,510.40/x
3. Step 3: Cross multiply
   1,510.40x = 2,116 × 1,510.40
4. Step 4: Simplify right side
   1,510.40x = 3,196,006.40
5. Step 5: Solve for x
   x = 3,196,006.40/1,510.40
6. Step 6: Final answer
   x = 2,116