Finding the Third Proportional to 143,080,080 and 309,929,890

Step by Step Solution

1. Step 1: Write the proportion equation
   143,080,080 : 309,929,890 = 309,929,890 : x
2. Step 2: Convert to fraction form
   143,080,080/309,929,890 = 309,929,890/x
3. Step 3: Cross multiply
   143,080,080x = 309,929,890 × 309,929,890
4. Step 4: Simplify right side
   143,080,080x = 96,056,536,715,412,096
5. Step 5: Solve for x
   x = 96,056,536,715,412,096/143,080,080
6. Step 6: Final answer
   x = 671,348,078.05