Finding the Third Proportional to 99,888,738,234 and 205,072,869,476

Step by Step Solution

1. Step 1: Write the proportion equation
   99,888,738,234 : 205,072,869,476 = 205,072,869,476 : x
2. Step 2: Convert to fraction form
   99,888,738,234/205,072,869,476 = 205,072,869,476/x
3. Step 3: Cross multiply
   99,888,738,234x = 205,072,869,476 × 205,072,869,476
4. Step 4: Simplify right side
   99,888,738,234x = 42,054,881,795,120,534,913,024
5. Step 5: Solve for x
   x = 42,054,881,795,120,534,913,024/99,888,738,234
6. Step 6: Final answer
   x = 421,017,249,177.81