Finding the Third Proportional to 551,157 and 780,103.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,157 : 780,103.50 = 780,103.50 : x
2. Step 2: Convert to fraction form
   551,157/780,103.50 = 780,103.50/x
3. Step 3: Cross multiply
   551,157x = 780,103.50 × 780,103.50
4. Step 4: Simplify right side
   551,157x = 608,561,470,712.25
5. Step 5: Solve for x
   x = 608,561,470,712.25/551,157
6. Step 6: Final answer
   x = 1,104,152.67