Finding the Third Proportional to 389,039,903.25 and 840,196,210.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,039,903.25 : 840,196,210.50 = 840,196,210.50 : x
2. Step 2: Convert to fraction form
   389,039,903.25/840,196,210.50 = 840,196,210.50/x
3. Step 3: Cross multiply
   389,039,903.25x = 840,196,210.50 × 840,196,210.50
4. Step 4: Simplify right side
   389,039,903.25x = 705,929,672,138,560,256
5. Step 5: Solve for x
   x = 705,929,672,138,560,256/389,039,903.25
6. Step 6: Final answer
   x = 1,814,543,100.18