Finding the Third Proportional to 31,387.50 and 42,646.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,387.50 : 42,646.50 = 42,646.50 : x
2. Step 2: Convert to fraction form
   31,387.50/42,646.50 = 42,646.50/x
3. Step 3: Cross multiply
   31,387.50x = 42,646.50 × 42,646.50
4. Step 4: Simplify right side
   31,387.50x = 1,818,723,962.25
5. Step 5: Solve for x
   x = 1,818,723,962.25/31,387.50
6. Step 6: Final answer
   x = 57,944.21