Finding the Third Proportional to 51,287,980 and 79,669,118

Step by Step Solution

1. Step 1: Write the proportion equation
   51,287,980 : 79,669,118 = 79,669,118 : x
2. Step 2: Convert to fraction form
   51,287,980/79,669,118 = 79,669,118/x
3. Step 3: Cross multiply
   51,287,980x = 79,669,118 × 79,669,118
4. Step 4: Simplify right side
   51,287,980x = 6,347,168,362,897,924
5. Step 5: Solve for x
   x = 6,347,168,362,897,924/51,287,980
6. Step 6: Final answer
   x = 123,755,475.71