Finding the Third Proportional to 490,844,424 and 781,407,300

Step by Step Solution

1. Step 1: Write the proportion equation
   490,844,424 : 781,407,300 = 781,407,300 : x
2. Step 2: Convert to fraction form
   490,844,424/781,407,300 = 781,407,300/x
3. Step 3: Cross multiply
   490,844,424x = 781,407,300 × 781,407,300
4. Step 4: Simplify right side
   490,844,424x = 610,597,368,493,289,984
5. Step 5: Solve for x
   x = 610,597,368,493,289,984/490,844,424
6. Step 6: Final answer
   x = 1,243,973,321.56