Finding the Third Proportional to 81,607,818 and 172,426,578

Step by Step Solution

1. Step 1: Write the proportion equation
   81,607,818 : 172,426,578 = 172,426,578 : x
2. Step 2: Convert to fraction form
   81,607,818/172,426,578 = 172,426,578/x
3. Step 3: Cross multiply
   81,607,818x = 172,426,578 × 172,426,578
4. Step 4: Simplify right side
   81,607,818x = 29,730,924,800,790,084
5. Step 5: Solve for x
   x = 29,730,924,800,790,084/81,607,818
6. Step 6: Final answer
   x = 364,314,664.08