Finding the Third Proportional to 53,818.50 and 73,878.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,818.50 : 73,878.50 = 73,878.50 : x
2. Step 2: Convert to fraction form
   53,818.50/73,878.50 = 73,878.50/x
3. Step 3: Cross multiply
   53,818.50x = 73,878.50 × 73,878.50
4. Step 4: Simplify right side
   53,818.50x = 5,458,032,762.25
5. Step 5: Solve for x
   x = 5,458,032,762.25/53,818.50
6. Step 6: Final answer
   x = 101,415.55