Finding the Third Proportional to 31,191,912 and 69,555,804

Step by Step Solution

1. Step 1: Write the proportion equation
   31,191,912 : 69,555,804 = 69,555,804 : x
2. Step 2: Convert to fraction form
   31,191,912/69,555,804 = 69,555,804/x
3. Step 3: Cross multiply
   31,191,912x = 69,555,804 × 69,555,804
4. Step 4: Simplify right side
   31,191,912x = 4,838,009,870,086,416
5. Step 5: Solve for x
   x = 4,838,009,870,086,416/31,191,912
6. Step 6: Final answer
   x = 155,104,626.80