Finding the Third Proportional to 728,112 and 1,139,692.50

Step by Step Solution

1. Step 1: Write the proportion equation
   728,112 : 1,139,692.50 = 1,139,692.50 : x
2. Step 2: Convert to fraction form
   728,112/1,139,692.50 = 1,139,692.50/x
3. Step 3: Cross multiply
   728,112x = 1,139,692.50 × 1,139,692.50
4. Step 4: Simplify right side
   728,112x = 1,298,898,994,556.25
5. Step 5: Solve for x
   x = 1,298,898,994,556.25/728,112
6. Step 6: Final answer
   x = 1,783,927.47