Finding the Third Proportional to 129,123.75 and 281,112

Step by Step Solution

1. Step 1: Write the proportion equation
   129,123.75 : 281,112 = 281,112 : x
2. Step 2: Convert to fraction form
   129,123.75/281,112 = 281,112/x
3. Step 3: Cross multiply
   129,123.75x = 281,112 × 281,112
4. Step 4: Simplify right side
   129,123.75x = 79,023,956,544
5. Step 5: Solve for x
   x = 79,023,956,544/129,123.75
6. Step 6: Final answer
   x = 612,001.72