Finding the Third Proportional to 1,312,214 and 2,142,711

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312,214 : 2,142,711 = 2,142,711 : x
2. Step 2: Convert to fraction form
   1,312,214/2,142,711 = 2,142,711/x
3. Step 3: Cross multiply
   1,312,214x = 2,142,711 × 2,142,711
4. Step 4: Simplify right side
   1,312,214x = 4,591,210,429,521
5. Step 5: Solve for x
   x = 4,591,210,429,521/1,312,214
6. Step 6: Final answer
   x = 3,498,827.50