Finding the Third Proportional to 420,066 and 651,199.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,066 : 651,199.50 = 651,199.50 : x
2. Step 2: Convert to fraction form
   420,066/651,199.50 = 651,199.50/x
3. Step 3: Cross multiply
   420,066x = 651,199.50 × 651,199.50
4. Step 4: Simplify right side
   420,066x = 424,060,788,800.25
5. Step 5: Solve for x
   x = 424,060,788,800.25/420,066
6. Step 6: Final answer
   x = 1,009,509.91