Finding the Third Proportional to 42,989.81 and 57,335.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,989.81 : 57,335.06 = 57,335.06 : x
2. Step 2: Convert to fraction form
   42,989.81/57,335.06 = 57,335.06/x
3. Step 3: Cross multiply
   42,989.81x = 57,335.06 × 57,335.06
4. Step 4: Simplify right side
   42,989.81x = 3,287,309,391.88
5. Step 5: Solve for x
   x = 3,287,309,391.88/42,989.81
6. Step 6: Final answer
   x = 76,467.17