Finding the Third Proportional to 142,791 and 313,603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,791 : 313,603.50 = 313,603.50 : x
2. Step 2: Convert to fraction form
   142,791/313,603.50 = 313,603.50/x
3. Step 3: Cross multiply
   142,791x = 313,603.50 × 313,603.50
4. Step 4: Simplify right side
   142,791x = 98,347,155,212.25
5. Step 5: Solve for x
   x = 98,347,155,212.25/142,791
6. Step 6: Final answer
   x = 688,748.98