Finding the Third Proportional to 503,847 and 780,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   503,847 : 780,109.50 = 780,109.50 : x
2. Step 2: Convert to fraction form
   503,847/780,109.50 = 780,109.50/x
3. Step 3: Cross multiply
   503,847x = 780,109.50 × 780,109.50
4. Step 4: Simplify right side
   503,847x = 608,570,831,990.25
5. Step 5: Solve for x
   x = 608,570,831,990.25/503,847
6. Step 6: Final answer
   x = 1,207,848.48