Finding the Third Proportional to 51,128,211 and 71,915,242.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,128,211 : 71,915,242.50 = 71,915,242.50 : x
2. Step 2: Convert to fraction form
   51,128,211/71,915,242.50 = 71,915,242.50/x
3. Step 3: Cross multiply
   51,128,211x = 71,915,242.50 × 71,915,242.50
4. Step 4: Simplify right side
   51,128,211x = 5,171,802,103,833,806
5. Step 5: Solve for x
   x = 5,171,802,103,833,806/51,128,211
6. Step 6: Final answer
   x = 101,153,590.21