Finding the Third Proportional to 292,417.50 and 637,719

Step by Step Solution

1. Step 1: Write the proportion equation
   292,417.50 : 637,719 = 637,719 : x
2. Step 2: Convert to fraction form
   292,417.50/637,719 = 637,719/x
3. Step 3: Cross multiply
   292,417.50x = 637,719 × 637,719
4. Step 4: Simplify right side
   292,417.50x = 406,685,522,961
5. Step 5: Solve for x
   x = 406,685,522,961/292,417.50
6. Step 6: Final answer
   x = 1,390,770.12