Finding the Third Proportional to 756,418.50 and 1,638,832.50

Step by Step Solution

1. Step 1: Write the proportion equation
   756,418.50 : 1,638,832.50 = 1,638,832.50 : x
2. Step 2: Convert to fraction form
   756,418.50/1,638,832.50 = 1,638,832.50/x
3. Step 3: Cross multiply
   756,418.50x = 1,638,832.50 × 1,638,832.50
4. Step 4: Simplify right side
   756,418.50x = 2,685,771,963,056.25
5. Step 5: Solve for x
   x = 2,685,771,963,056.25/756,418.50
6. Step 6: Final answer
   x = 3,550,642.88