Finding the Third Proportional to 2,116,421 and 4,572,434

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,421 : 4,572,434 = 4,572,434 : x
2. Step 2: Convert to fraction form
   2,116,421/4,572,434 = 4,572,434/x
3. Step 3: Cross multiply
   2,116,421x = 4,572,434 × 4,572,434
4. Step 4: Simplify right side
   2,116,421x = 20,907,152,684,356
5. Step 5: Solve for x
   x = 20,907,152,684,356/2,116,421
6. Step 6: Final answer
   x = 9,878,541.50