Finding the Third Proportional to 728,151 and 1,139,747.50

Step by Step Solution

1. Step 1: Write the proportion equation
   728,151 : 1,139,747.50 = 1,139,747.50 : x
2. Step 2: Convert to fraction form
   728,151/1,139,747.50 = 1,139,747.50/x
3. Step 3: Cross multiply
   728,151x = 1,139,747.50 × 1,139,747.50
4. Step 4: Simplify right side
   728,151x = 1,299,024,363,756.25
5. Step 5: Solve for x
   x = 1,299,024,363,756.25/728,151
6. Step 6: Final answer
   x = 1,784,004.09