Finding the Third Proportional to 287,878,400 and 626,871,040

Step by Step Solution

1. Step 1: Write the proportion equation
   287,878,400 : 626,871,040 = 626,871,040 : x
2. Step 2: Convert to fraction form
   287,878,400/626,871,040 = 626,871,040/x
3. Step 3: Cross multiply
   287,878,400x = 626,871,040 × 626,871,040
4. Step 4: Simplify right side
   287,878,400x = 392,967,300,790,681,600
5. Step 5: Solve for x
   x = 392,967,300,790,681,600/287,878,400
6. Step 6: Final answer
   x = 1,365,046,147.23