Finding the Third Proportional to 129,245 and 189,607.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,245 : 189,607.50 = 189,607.50 : x
2. Step 2: Convert to fraction form
   129,245/189,607.50 = 189,607.50/x
3. Step 3: Cross multiply
   129,245x = 189,607.50 × 189,607.50
4. Step 4: Simplify right side
   129,245x = 35,951,004,056.25
5. Step 5: Solve for x
   x = 35,951,004,056.25/129,245
6. Step 6: Final answer
   x = 278,161.66