Finding the Third Proportional to 65,663,138 and 142,541,140

Step by Step Solution

1. Step 1: Write the proportion equation
   65,663,138 : 142,541,140 = 142,541,140 : x
2. Step 2: Convert to fraction form
   65,663,138/142,541,140 = 142,541,140/x
3. Step 3: Cross multiply
   65,663,138x = 142,541,140 × 142,541,140
4. Step 4: Simplify right side
   65,663,138x = 20,317,976,592,499,600
5. Step 5: Solve for x
   x = 20,317,976,592,499,600/65,663,138
6. Step 6: Final answer
   x = 309,427,438.46