Finding the Third Proportional to 42,619.50 and 89,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,619.50 : 89,851.50 = 89,851.50 : x
2. Step 2: Convert to fraction form
   42,619.50/89,851.50 = 89,851.50/x
3. Step 3: Cross multiply
   42,619.50x = 89,851.50 × 89,851.50
4. Step 4: Simplify right side
   42,619.50x = 8,073,292,052.25
5. Step 5: Solve for x
   x = 8,073,292,052.25/42,619.50
6. Step 6: Final answer
   x = 189,427.19