Finding the Third Proportional to 288,702,298.50 and 673,661,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   288,702,298.50 : 673,661,978.25 = 673,661,978.25 : x
2. Step 2: Convert to fraction form
   288,702,298.50/673,661,978.25 = 673,661,978.25/x
3. Step 3: Cross multiply
   288,702,298.50x = 673,661,978.25 × 673,661,978.25
4. Step 4: Simplify right side
   288,702,298.50x = 453,820,460,939,703,488
5. Step 5: Solve for x
   x = 453,820,460,939,703,488/288,702,298.50
6. Step 6: Final answer
   x = 1,571,932,275.21