Finding the Third Proportional to 2,620,390 and 5,555,709

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620,390 : 5,555,709 = 5,555,709 : x
2. Step 2: Convert to fraction form
   2,620,390/5,555,709 = 5,555,709/x
3. Step 3: Cross multiply
   2,620,390x = 5,555,709 × 5,555,709
4. Step 4: Simplify right side
   2,620,390x = 30,865,902,492,681
5. Step 5: Solve for x
   x = 30,865,902,492,681/2,620,390
6. Step 6: Final answer
   x = 11,779,125.43