Finding the Third Proportional to 428,174 and 602,430.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,174 : 602,430.50 = 602,430.50 : x
2. Step 2: Convert to fraction form
   428,174/602,430.50 = 602,430.50/x
3. Step 3: Cross multiply
   428,174x = 602,430.50 × 602,430.50
4. Step 4: Simplify right side
   428,174x = 362,922,507,330.25
5. Step 5: Solve for x
   x = 362,922,507,330.25/428,174
6. Step 6: Final answer
   x = 847,605.20