Finding the Third Proportional to 42,000 and 56,040

Step by Step Solution

1. Step 1: Write the proportion equation
   42,000 : 56,040 = 56,040 : x
2. Step 2: Convert to fraction form
   42,000/56,040 = 56,040/x
3. Step 3: Cross multiply
   42,000x = 56,040 × 56,040
4. Step 4: Simplify right side
   42,000x = 3,140,481,600
5. Step 5: Solve for x
   x = 3,140,481,600/42,000
6. Step 6: Final answer
   x = 74,773.37