Finding the Third Proportional to 379,426.88 and 812,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   379,426.88 : 812,647.50 = 812,647.50 : x
2. Step 2: Convert to fraction form
   379,426.88/812,647.50 = 812,647.50/x
3. Step 3: Cross multiply
   379,426.88x = 812,647.50 × 812,647.50
4. Step 4: Simplify right side
   379,426.88x = 660,395,959,256.25
5. Step 5: Solve for x
   x = 660,395,959,256.25/379,426.88
6. Step 6: Final answer
   x = 1,740,509.18