Finding the Third Proportional to 2,129,520 and 4,644,432

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129,520 : 4,644,432 = 4,644,432 : x
2. Step 2: Convert to fraction form
   2,129,520/4,644,432 = 4,644,432/x
3. Step 3: Cross multiply
   2,129,520x = 4,644,432 × 4,644,432
4. Step 4: Simplify right side
   2,129,520x = 21,570,748,602,624
5. Step 5: Solve for x
   x = 21,570,748,602,624/2,129,520
6. Step 6: Final answer
   x = 10,129,394.70