Finding the Third Proportional to 129,127.50 and 281,124

Step by Step Solution

1. Step 1: Write the proportion equation
   129,127.50 : 281,124 = 281,124 : x
2. Step 2: Convert to fraction form
   129,127.50/281,124 = 281,124/x
3. Step 3: Cross multiply
   129,127.50x = 281,124 × 281,124
4. Step 4: Simplify right side
   129,127.50x = 79,030,703,376
5. Step 5: Solve for x
   x = 79,030,703,376/129,127.50
6. Step 6: Final answer
   x = 612,036.19