Finding the Third Proportional to 139,793,078 and 218,816,146

Step by Step Solution

1. Step 1: Write the proportion equation
   139,793,078 : 218,816,146 = 218,816,146 : x
2. Step 2: Convert to fraction form
   139,793,078/218,816,146 = 218,816,146/x
3. Step 3: Cross multiply
   139,793,078x = 218,816,146 × 218,816,146
4. Step 4: Simplify right side
   139,793,078x = 47,880,505,750,293,312
5. Step 5: Solve for x
   x = 47,880,505,750,293,312/139,793,078
6. Step 6: Final answer
   x = 342,509,846.95