Finding the Third Proportional to 12,942,124 and 20,603,440

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942,124 : 20,603,440 = 20,603,440 : x
2. Step 2: Convert to fraction form
   12,942,124/20,603,440 = 20,603,440/x
3. Step 3: Cross multiply
   12,942,124x = 20,603,440 × 20,603,440
4. Step 4: Simplify right side
   12,942,124x = 424,501,739,833,600
5. Step 5: Solve for x
   x = 424,501,739,833,600/12,942,124
6. Step 6: Final answer
   x = 32,800,005.61