Finding the Third Proportional to 142,801.50 and 313,627.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,801.50 : 313,627.69 = 313,627.69 : x
2. Step 2: Convert to fraction form
   142,801.50/313,627.69 = 313,627.69/x
3. Step 3: Cross multiply
   142,801.50x = 313,627.69 × 313,627.69
4. Step 4: Simplify right side
   142,801.50x = 98,362,326,366.60
5. Step 5: Solve for x
   x = 98,362,326,366.60/142,801.50
6. Step 6: Final answer
   x = 688,804.57