Finding the Third Proportional to 168,640.50 and 359,129

Step by Step Solution

1. Step 1: Write the proportion equation
   168,640.50 : 359,129 = 359,129 : x
2. Step 2: Convert to fraction form
   168,640.50/359,129 = 359,129/x
3. Step 3: Cross multiply
   168,640.50x = 359,129 × 359,129
4. Step 4: Simplify right side
   168,640.50x = 128,973,638,641
5. Step 5: Solve for x
   x = 128,973,638,641/168,640.50
6. Step 6: Final answer
   x = 764,784.49