Finding the Third Proportional to 12,921,282 and 20,017,165.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921,282 : 20,017,165.50 = 20,017,165.50 : x
2. Step 2: Convert to fraction form
   12,921,282/20,017,165.50 = 20,017,165.50/x
3. Step 3: Cross multiply
   12,921,282x = 20,017,165.50 × 20,017,165.50
4. Step 4: Simplify right side
   12,921,282x = 400,686,914,654,390.25
5. Step 5: Solve for x
   x = 400,686,914,654,390.25/12,921,282
6. Step 6: Final answer
   x = 31,009,842.11