Finding the Third Proportional to 42,086.25 and 70,135.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,086.25 : 70,135.88 = 70,135.88 : x
2. Step 2: Convert to fraction form
   42,086.25/70,135.88 = 70,135.88/x
3. Step 3: Cross multiply
   42,086.25x = 70,135.88 × 70,135.88
4. Step 4: Simplify right side
   42,086.25x = 4,919,040,962.02
5. Step 5: Solve for x
   x = 4,919,040,962.02/42,086.25
6. Step 6: Final answer
   x = 116,880.00