Finding the Third Proportional to 551,166 and 780,106.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,166 : 780,106.50 = 780,106.50 : x
2. Step 2: Convert to fraction form
   551,166/780,106.50 = 780,106.50/x
3. Step 3: Cross multiply
   551,166x = 780,106.50 × 780,106.50
4. Step 4: Simplify right side
   551,166x = 608,566,151,342.25
5. Step 5: Solve for x
   x = 608,566,151,342.25/551,166
6. Step 6: Final answer
   x = 1,104,143.13