Finding the Fourth Proportional to 82,136,362.88, 123,325,658.78 and 45,815,716.64

Step by Step Solution

1. Step 1: Write the proportion equation
   82,136,362.88 : 123,325,658.78 = 45,815,716.64 : x
2. Step 2: Convert to fraction form
   82,136,362.88/123,325,658.78 = 45,815,716.64/x
3. Step 3: Cross multiply
   82,136,362.88x = 123,325,658.78 × 45,815,716.64
4. Step 4: Simplify right side
   82,136,362.88x = 5,650,253,436,260,101
5. Step 5: Solve for x
   x = 5,650,253,436,260,101/82,136,362.88
6. Step 6: Final answer
   x = 68,791,132.68