Finding the Third Proportional to 128,260 and 282,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,260 : 282,798.50 = 282,798.50 : x
2. Step 2: Convert to fraction form
   128,260/282,798.50 = 282,798.50/x
3. Step 3: Cross multiply
   128,260x = 282,798.50 × 282,798.50
4. Step 4: Simplify right side
   128,260x = 79,974,991,602.25
5. Step 5: Solve for x
   x = 79,974,991,602.25/128,260
6. Step 6: Final answer
   x = 623,538.06