Finding the Third Proportional to 1,977,142 and 4,315,140

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977,142 : 4,315,140 = 4,315,140 : x
2. Step 2: Convert to fraction form
   1,977,142/4,315,140 = 4,315,140/x
3. Step 3: Cross multiply
   1,977,142x = 4,315,140 × 4,315,140
4. Step 4: Simplify right side
   1,977,142x = 18,620,433,219,600
5. Step 5: Solve for x
   x = 18,620,433,219,600/1,977,142
6. Step 6: Final answer
   x = 9,417,853.25