Finding the Third Proportional to 428,343 and 601,690.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,343 : 601,690.50 = 601,690.50 : x
2. Step 2: Convert to fraction form
   428,343/601,690.50 = 601,690.50/x
3. Step 3: Cross multiply
   428,343x = 601,690.50 × 601,690.50
4. Step 4: Simplify right side
   428,343x = 362,031,457,790.25
5. Step 5: Solve for x
   x = 362,031,457,790.25/428,343
6. Step 6: Final answer
   x = 845,190.55