Finding the Third Proportional to 31,203 and 42,342.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,203 : 42,342.75 = 42,342.75 : x
2. Step 2: Convert to fraction form
   31,203/42,342.75 = 42,342.75/x
3. Step 3: Cross multiply
   31,203x = 42,342.75 × 42,342.75
4. Step 4: Simplify right side
   31,203x = 1,792,908,477.56
5. Step 5: Solve for x
   x = 1,792,908,477.56/31,203
6. Step 6: Final answer
   x = 57,459.49