Finding the Third Proportional to 1,210.51 and 1,870.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210.51 : 1,870.51 = 1,870.51 : x
2. Step 2: Convert to fraction form
   1,210.51/1,870.51 = 1,870.51/x
3. Step 3: Cross multiply
   1,210.51x = 1,870.51 × 1,870.51
4. Step 4: Simplify right side
   1,210.51x = 3,498,792.17
5. Step 5: Solve for x
   x = 3,498,792.17/1,210.51
6. Step 6: Final answer
   x = 2,890.34