Finding the Third Proportional to 129,020 and 189,736.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,020 : 189,736.50 = 189,736.50 : x
2. Step 2: Convert to fraction form
   129,020/189,736.50 = 189,736.50/x
3. Step 3: Cross multiply
   129,020x = 189,736.50 × 189,736.50
4. Step 4: Simplify right side
   129,020x = 35,999,939,432.25
5. Step 5: Solve for x
   x = 35,999,939,432.25/129,020
6. Step 6: Final answer
   x = 279,026.04