Finding the Third Proportional to 42,212.25 and 66,841.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,212.25 : 66,841.88 = 66,841.88 : x
2. Step 2: Convert to fraction form
   42,212.25/66,841.88 = 66,841.88/x
3. Step 3: Cross multiply
   42,212.25x = 66,841.88 × 66,841.88
4. Step 4: Simplify right side
   42,212.25x = 4,467,836,253.52
5. Step 5: Solve for x
   x = 4,467,836,253.52/42,212.25
6. Step 6: Final answer
   x = 105,842.17