Finding the Third Proportional to 148,140 and 318,759

Step by Step Solution

1. Step 1: Write the proportion equation
   148,140 : 318,759 = 318,759 : x
2. Step 2: Convert to fraction form
   148,140/318,759 = 318,759/x
3. Step 3: Cross multiply
   148,140x = 318,759 × 318,759
4. Step 4: Simplify right side
   148,140x = 101,607,300,081
5. Step 5: Solve for x
   x = 101,607,300,081/148,140
6. Step 6: Final answer
   x = 685,887.00