Finding the Third Proportional to 42,817.50 and 66,818.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,817.50 : 66,818.25 = 66,818.25 : x
2. Step 2: Convert to fraction form
   42,817.50/66,818.25 = 66,818.25/x
3. Step 3: Cross multiply
   42,817.50x = 66,818.25 × 66,818.25
4. Step 4: Simplify right side
   42,817.50x = 4,464,678,533.06
5. Step 5: Solve for x
   x = 4,464,678,533.06/42,817.50
6. Step 6: Final answer
   x = 104,272.28