Finding the Third Proportional to 120,865,719.38 and 258,961,677.75

Step by Step Solution

1. Step 1: Write the proportion equation
   120,865,719.38 : 258,961,677.75 = 258,961,677.75 : x
2. Step 2: Convert to fraction form
   120,865,719.38/258,961,677.75 = 258,961,677.75/x
3. Step 3: Cross multiply
   120,865,719.38x = 258,961,677.75 × 258,961,677.75
4. Step 4: Simplify right side
   120,865,719.38x = 67,061,150,543,094,848
5. Step 5: Solve for x
   x = 67,061,150,543,094,848/120,865,719.38
6. Step 6: Final answer
   x = 554,840,122.49