Finding the Third Proportional to 420,411 and 604,372.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,411 : 604,372.50 = 604,372.50 : x
2. Step 2: Convert to fraction form
   420,411/604,372.50 = 604,372.50/x
3. Step 3: Cross multiply
   420,411x = 604,372.50 × 604,372.50
4. Step 4: Simplify right side
   420,411x = 365,266,118,756.25
5. Step 5: Solve for x
   x = 365,266,118,756.25/420,411
6. Step 6: Final answer
   x = 868,831.02