Finding the Third Proportional to 31,490,450,451 and 69,399,657,774

Step by Step Solution

1. Step 1: Write the proportion equation
   31,490,450,451 : 69,399,657,774 = 69,399,657,774 : x
2. Step 2: Convert to fraction form
   31,490,450,451/69,399,657,774 = 69,399,657,774/x
3. Step 3: Cross multiply
   31,490,450,451x = 69,399,657,774 × 69,399,657,774
4. Step 4: Simplify right side
   31,490,450,451x = 4,816,312,499,148,318,310,400
5. Step 5: Solve for x
   x = 4,816,312,499,148,318,310,400/31,490,450,451
6. Step 6: Final answer
   x = 152,945,176,400.15