Finding the Third Proportional to 555,080 and 1,210,400

Step by Step Solution

1. Step 1: Write the proportion equation
   555,080 : 1,210,400 = 1,210,400 : x
2. Step 2: Convert to fraction form
   555,080/1,210,400 = 1,210,400/x
3. Step 3: Cross multiply
   555,080x = 1,210,400 × 1,210,400
4. Step 4: Simplify right side
   555,080x = 1,465,068,160,000
5. Step 5: Solve for x
   x = 1,465,068,160,000/555,080
6. Step 6: Final answer
   x = 2,639,382.00