Finding the Third Proportional to 505,320 and 739,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   505,320 : 739,129.50 = 739,129.50 : x
2. Step 2: Convert to fraction form
   505,320/739,129.50 = 739,129.50/x
3. Step 3: Cross multiply
   505,320x = 739,129.50 × 739,129.50
4. Step 4: Simplify right side
   505,320x = 546,312,417,770.25
5. Step 5: Solve for x
   x = 546,312,417,770.25/505,320
6. Step 6: Final answer
   x = 1,081,121.70