Finding the Third Proportional to 42,148 and 56,558

Step by Step Solution

1. Step 1: Write the proportion equation
   42,148 : 56,558 = 56,558 : x
2. Step 2: Convert to fraction form
   42,148/56,558 = 56,558/x
3. Step 3: Cross multiply
   42,148x = 56,558 × 56,558
4. Step 4: Simplify right side
   42,148x = 3,198,807,364
5. Step 5: Solve for x
   x = 3,198,807,364/42,148
6. Step 6: Final answer
   x = 75,894.64