Finding the Third Proportional to 728,081.72 and 1,139,657.06

Step by Step Solution

1. Step 1: Write the proportion equation
   728,081.72 : 1,139,657.06 = 1,139,657.06 : x
2. Step 2: Convert to fraction form
   728,081.72/1,139,657.06 = 1,139,657.06/x
3. Step 3: Cross multiply
   728,081.72x = 1,139,657.06 × 1,139,657.06
4. Step 4: Simplify right side
   728,081.72x = 1,298,818,220,106.13
5. Step 5: Solve for x
   x = 1,298,818,220,106.13/728,081.72
6. Step 6: Final answer
   x = 1,783,890.72