Finding the Third Proportional to 31,691,590 and 69,458,666

Step by Step Solution

1. Step 1: Write the proportion equation
   31,691,590 : 69,458,666 = 69,458,666 : x
2. Step 2: Convert to fraction form
   31,691,590/69,458,666 = 69,458,666/x
3. Step 3: Cross multiply
   31,691,590x = 69,458,666 × 69,458,666
4. Step 4: Simplify right side
   31,691,590x = 4,824,506,282,499,556
5. Step 5: Solve for x
   x = 4,824,506,282,499,556/31,691,590
6. Step 6: Final answer
   x = 152,233,014.58