Finding the Third Proportional to 99,625,142 and 205,616,658

Step by Step Solution

1. Step 1: Write the proportion equation
   99,625,142 : 205,616,658 = 205,616,658 : x
2. Step 2: Convert to fraction form
   99,625,142/205,616,658 = 205,616,658/x
3. Step 3: Cross multiply
   99,625,142x = 205,616,658 × 205,616,658
4. Step 4: Simplify right side
   99,625,142x = 42,278,210,047,088,960
5. Step 5: Solve for x
   x = 42,278,210,047,088,960/99,625,142
6. Step 6: Final answer
   x = 424,372,896.22