Finding the Third Proportional to 143,080,069.50 and 309,929,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,080,069.50 : 309,929,863.50 = 309,929,863.50 : x
2. Step 2: Convert to fraction form
   143,080,069.50/309,929,863.50 = 309,929,863.50/x
3. Step 3: Cross multiply
   143,080,069.50x = 309,929,863.50 × 309,929,863.50
4. Step 4: Simplify right side
   143,080,069.50x = 96,056,520,289,128,640
5. Step 5: Solve for x
   x = 96,056,520,289,128,640/143,080,069.50
6. Step 6: Final answer
   x = 671,348,012.51