Finding the Third Proportional to 1,210.63 and 1,861.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210.63 : 1,861.69 = 1,861.69 : x
2. Step 2: Convert to fraction form
   1,210.63/1,861.69 = 1,861.69/x
3. Step 3: Cross multiply
   1,210.63x = 1,861.69 × 1,861.69
4. Step 4: Simplify right side
   1,210.63x = 3,465,880.35
5. Step 5: Solve for x
   x = 3,465,880.35/1,210.63
6. Step 6: Final answer
   x = 2,862.89