Finding the Third Proportional to 54,072,136 and 83,779,864

Step by Step Solution

1. Step 1: Write the proportion equation
   54,072,136 : 83,779,864 = 83,779,864 : x
2. Step 2: Convert to fraction form
   54,072,136/83,779,864 = 83,779,864/x
3. Step 3: Cross multiply
   54,072,136x = 83,779,864 × 83,779,864
4. Step 4: Simplify right side
   54,072,136x = 7,019,065,611,858,496
5. Step 5: Solve for x
   x = 7,019,065,611,858,496/54,072,136
6. Step 6: Final answer
   x = 129,809,290.53