Finding the Third Proportional to 438,099 and 659,092.50

Step by Step Solution

1. Step 1: Write the proportion equation
   438,099 : 659,092.50 = 659,092.50 : x
2. Step 2: Convert to fraction form
   438,099/659,092.50 = 659,092.50/x
3. Step 3: Cross multiply
   438,099x = 659,092.50 × 659,092.50
4. Step 4: Simplify right side
   438,099x = 434,402,923,556.25
5. Step 5: Solve for x
   x = 434,402,923,556.25/438,099
6. Step 6: Final answer
   x = 991,563.38