Finding the Third Proportional to 42,390 and 56,252

Step by Step Solution

1. Step 1: Write the proportion equation
   42,390 : 56,252 = 56,252 : x
2. Step 2: Convert to fraction form
   42,390/56,252 = 56,252/x
3. Step 3: Cross multiply
   42,390x = 56,252 × 56,252
4. Step 4: Simplify right side
   42,390x = 3,164,287,504
5. Step 5: Solve for x
   x = 3,164,287,504/42,390
6. Step 6: Final answer
   x = 74,647.03