Finding the Third Proportional to 31,430.25 and 42,710.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,430.25 : 42,710.63 = 42,710.63 : x
2. Step 2: Convert to fraction form
   31,430.25/42,710.63 = 42,710.63/x
3. Step 3: Cross multiply
   31,430.25x = 42,710.63 × 42,710.63
4. Step 4: Simplify right side
   31,430.25x = 1,824,197,487.89
5. Step 5: Solve for x
   x = 1,824,197,487.89/31,430.25
6. Step 6: Final answer
   x = 58,039.55