Finding the Third Proportional to 1,780,654 and 4,199,209

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780,654 : 4,199,209 = 4,199,209 : x
2. Step 2: Convert to fraction form
   1,780,654/4,199,209 = 4,199,209/x
3. Step 3: Cross multiply
   1,780,654x = 4,199,209 × 4,199,209
4. Step 4: Simplify right side
   1,780,654x = 17,633,356,225,681
5. Step 5: Solve for x
   x = 17,633,356,225,681/1,780,654
6. Step 6: Final answer
   x = 9,902,741.48