Finding the Third Proportional to 129,370 and 282,785.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,370 : 282,785.50 = 282,785.50 : x
2. Step 2: Convert to fraction form
   129,370/282,785.50 = 282,785.50/x
3. Step 3: Cross multiply
   129,370x = 282,785.50 × 282,785.50
4. Step 4: Simplify right side
   129,370x = 79,967,639,010.25
5. Step 5: Solve for x
   x = 79,967,639,010.25/129,370
6. Step 6: Final answer
   x = 618,131.24