Finding the Third Proportional to 287,878,406.50 and 626,871,053

Step by Step Solution

1. Step 1: Write the proportion equation
   287,878,406.50 : 626,871,053 = 626,871,053 : x
2. Step 2: Convert to fraction form
   287,878,406.50/626,871,053 = 626,871,053/x
3. Step 3: Cross multiply
   287,878,406.50x = 626,871,053 × 626,871,053
4. Step 4: Simplify right side
   287,878,406.50x = 392,967,317,089,328,832
5. Step 5: Solve for x
   x = 392,967,317,089,328,832/287,878,406.50
6. Step 6: Final answer
   x = 1,365,046,173.02