Finding the Third Proportional to 84,905,721 and 181,920,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   84,905,721 : 181,920,172.50 = 181,920,172.50 : x
2. Step 2: Convert to fraction form
   84,905,721/181,920,172.50 = 181,920,172.50/x
3. Step 3: Cross multiply
   84,905,721x = 181,920,172.50 × 181,920,172.50
4. Step 4: Simplify right side
   84,905,721x = 33,094,949,162,429,756
5. Step 5: Solve for x
   x = 33,094,949,162,429,756/84,905,721
6. Step 6: Final answer
   x = 389,784,678.50