Finding the Third Proportional to 551,498.63 and 780,409.69

Step by Step Solution

1. Step 1: Write the proportion equation
   551,498.63 : 780,409.69 = 780,409.69 : x
2. Step 2: Convert to fraction form
   551,498.63/780,409.69 = 780,409.69/x
3. Step 3: Cross multiply
   551,498.63x = 780,409.69 × 780,409.69
4. Step 4: Simplify right side
   551,498.63x = 609,039,280,343.85
5. Step 5: Solve for x
   x = 609,039,280,343.85/551,498.63
6. Step 6: Final answer
   x = 1,104,335.08