Finding the Third Proportional to 31,518 and 42,054.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,518 : 42,054.75 = 42,054.75 : x
2. Step 2: Convert to fraction form
   31,518/42,054.75 = 42,054.75/x
3. Step 3: Cross multiply
   31,518x = 42,054.75 × 42,054.75
4. Step 4: Simplify right side
   31,518x = 1,768,601,997.56
5. Step 5: Solve for x
   x = 1,768,601,997.56/31,518
6. Step 6: Final answer
   x = 56,114.03